7DTD The Equalizer / Extended inventory fix

In controls.xml (.\TheEqualizer\Config\XUi) add the code below in append section

<pzg_backpack_item_stack_50 controller="ItemStack" on_scroll="false" allow_dropping="true" prefix_id="false" show_favorites="false">
            <rect controller="${controller}"
                  width="50" height="50"
                  style="itemStack, hover"
                  collider_scale="1.0"
                  on_scroll="${on_scroll}"
                  allow_dropping="${allow_dropping}"
                  prefix_id="${prefix_id}"
                  show_favorites="${show_favorites}"
                  tooltip="{tooltip}"
                  enabled="{# !defined('userlockmode') or !userlockmode}" >

                <!-- 50x50 -->
                <sprite depth="2" name="backgroundMain" sprite="menu_empty3px"
                        pos="0,0" width="50" height="50"
                        color="[black]" type="sliced" fillcenter="false" />

                <sprite depth="3" name="background" sprite="menu_empty3px"
                        pos="1,-1" width="48" height="48"
                        color="{selectionbordercolor}" type="sliced" globalopacity="true" fillcenter="false"/>

                <sprite depth="2" name="highlightOverlay"
                        pos="2,-2" width="46" height="46"
                        color="{backgroundcolor}" type="sliced" globalopacity="true"/>

                <texture depth="3" name="backgroundTexture"
                         material="Materials/Transparent Colored"
                         globalopacity="true" size="48,48" />

                <!-- Icons for 50x50 -->
                <sprite depth="8" name="favoriteIcon"
                        width="16" height="16" sprite="server_favorite"
                        pos="2,-2" foregroundlayer="true" visible="{isfavorite}"/>

                <sprite depth="8" name="lockTypeIcon"
                        width="16" height="16" sprite="{locktypeicon}"
                        pos="2,-2" foregroundlayer="true"/>

                <sprite depth="8" name="itemtypeicon"
                        width="16" height="16" sprite="ui_game_symbol_{itemtypeicon}"
                        pos="2,-2" foregroundlayer="true" visible="{hasitemtypeicon}" color="{itemtypeicontint}" />

                <!-- Main icon, centered -->
                <sprite depth="6" name="itemIcon"
                        width="42" height="42"
                        atlas="ItemIconAtlas" sprite="{itemicon}"
                        pivot="center" foregroundlayer="true" color="{iconcolor}"
                        pos="25,-23" />

                <!-- Durability 50x50 -->
                <sprite depth="3" name="durabilityBackground" sprite="menu_empty3px"
                        color="[darkGrey]" type="sliced" foregroundlayer="true" visible="{hasdurability}"
                        width="46" height="8" pos="2,-42" />
                <filledsprite depth="4" name="durability" sprite="menu_empty2px"
                              color="{durabilitycolor}" fill="{durabilityfill}" type="filled"
                              foregroundlayer="true" visible="{hasdurability}"
                              width="46" height="8" pos="2,-42" />

                <!-- Quantity -->
                <label depth="7" name="stackValue"
                       height="20" width="46"
                       text="{itemcount}" font_size="18" effect="outline"
                       justify="{#hasdurability ? 'Center' : 'Right'}"
                       pos="2,-32" />

                <!-- Timer -->
                <label depth="7" name="timer"
                       height="20" width="46"
                       font_size="18" justify="center" pivot="center"
                       color="[beige]" effect="outline"
                       pos="25,-25" />

                <!-- Assemble icon: 50x50 -->
                <sprite depth="13" name="assembleIcon"
                        sprite="{stacklockicon}" color="{stacklockcolor}"
                        visible="{isassemblelocked}"
                        pos="10,-10" foregroundlayer="true" size="22,22" />

            </rect>
        </pzg_backpack_item_stack_50>

So it will look like:
<pzg_craft_queue_stack>
    ...
</pzg_craft_queue_stack>
<pzg_backpack_item_stack>
    ...
</pzg_backpack_item_stack>
<pzg_backpack_item_stack_50>
    ...
</pzg_backpack_item_stack_50>


And change the code in windows.xml to use pzg_backpack_item_stack_50 instead of pzg_backpack_item_stack
Was (wrong for me):
    <!-- ============================================ -->
    <!-- BACKPACK: 72 slots (8 rows) + move up 40px  -->
    <!-- ============================================ -->
    <set xpath="/windows/window[@name='windowBackpack']/@width">606</set>
    <set xpath="/windows/window[@name='windowBackpack']/@height">352</set>
    <set xpath="/windows/window[@name='windowBackpack']/panel[@name='content']/@height">306</set>
    <set xpath="/windows/window[@name='windowBackpack']/panel[@name='content']/sprite[@name='backgroundMain']/@width">606</set>
    <set xpath="/windows/window[@name='windowBackpack']/panel[@name='content']/sprite[@name='backgroundMain']/@height">306</set>

    <!-- 72 slots: 12 columns by 6 rows -->
    <set xpath="/windows/window[@name='windowBackpack']/panel[@name='content']/grid[@name='inventory']/@rows">6</set>
    <set xpath="/windows/window[@name='windowBackpack']/panel[@name='content']/grid[@name='inventory']/@cols">12</set>
    <set xpath="/windows/window[@name='windowBackpack']/panel[@name='content']/grid[@name='inventory']/@cell_height">50</set>
    <set xpath="/windows/window[@name='windowBackpack']/panel[@name='content']/grid[@name='inventory']/@cell_width">50</set>

    <!-- Use the new stack control -->
    <remove xpath="/windows/window[@name='windowBackpack']/panel[@name='content']/grid[@name='inventory']/backpack_item_stack"/>
    <append xpath="/windows/window[@name='windowBackpack']/panel[@name='content']/grid[@name='inventory']">
        <pzg_backpack_item_stack_50 name="0"/>
    </append>

New, working:
    <!-- ============================================ -->
    <!-- BACKPACK: 72 slots (8 rows) + move up 40px  -->
    <!-- ============================================ -->
    <set xpath="/windows/window[@name='windowBackpack']/@width">606</set>
    <set xpath="/windows/window[@name='windowBackpack']/@height">352</set>
    <set xpath="/windows/window[@name='windowBackpack']/panel[@name='content']/@height">306</set>
    <set xpath="/windows/window[@name='windowBackpack']/panel[@name='content']/sprite[@name='backgroundMain']/@width">606</set>
    <set xpath="/windows/window[@name='windowBackpack']/panel[@name='content']/sprite[@name='backgroundMain']/@height">306</set>

    <!-- 72 slots: 12 columns by 6 rows -->
    <set xpath="/windows/window[@name='windowBackpack']/panel[@name='content']/grid[@name='inventory']/@rows">6</set>
    <set xpath="/windows/window[@name='windowBackpack']/panel[@name='content']/grid[@name='inventory']/@cols">12</set>
    <set xpath="/windows/window[@name='windowBackpack']/panel[@name='content']/grid[@name='inventory']/@cell_width">50</set>
    <set xpath="/windows/window[@name='windowBackpack']/panel[@name='content']/grid[@name='inventory']/@cell_height">50</set>

    <!-- pos vanilla -->
    <set xpath="/windows/window[@name='windowBackpack']/panel[@name='content']/grid[@name='inventory']/@pos">3,-3</set>

    <remove xpath="/windows/window[@name='windowBackpack']/panel[@name='content']/grid[@name='inventory']/backpack_item_stack"/>
    <append xpath="/windows/window[@name='windowBackpack']/panel[@name='content']/grid[@name='inventory']">
      <pzg_backpack_item_stack_50 name="0"/>
    </append>