Conditional Includes based on Aspect Ratio

<includes>
    <include file="defaults.xml" />
    <include file="IncludesCodecFlagging.xml" />
    <include file="IncludesPlayerControls.xml" />
    <include file="IncludesHomeRecentlyAdded.xml" />
    <include file="IncludesKeypad.xml" />

    <include condition="StringCompare(Skin.AspectRatio,16:9)" file="ViewsCommon.xml" />
    <include condition="StringCompare(Skin.AspectRatio,16:9)" file="ViewsMetaData.xml" />
    <include condition="StringCompare(Skin.AspectRatio,16:9)" file="ViewsAddonBrowser.xml" />
    <include condition="StringCompare(Skin.AspectRatio,16:9)" file="ViewsPVR.xml" />

    <include condition="StringCompare(Skin.AspectRatio,4:3)" file="ViewsCommon-4x3.xml" />
    <include condition="StringCompare(Skin.AspectRatio,4:3)" file="ViewsMetaData-4x3.xml" />
    <include condition="StringCompare(Skin.AspectRatio,4:3)" file="ViewsAddonBrowser-4x3.xml" />
    <include condition="StringCompare(Skin.AspectRatio,4:3)" file="ViewsPVR-4x3.xml" />

    <constant name="ScreenHeight">960</constant>
    <constant name="FanartCrossfadeTime">500</constant>
    <constant name="IconCrossfadeTime">400</constant>

    <include name="BackgroundWidth">
        <include condition="StringCompare(Skin.AspectRatio,16:9)">BackgroundWidth-16x9</include>
        <include condition="StringCompare(Skin.AspectRatio,4:3)">BackgroundWidth-4x3</include>
    </include>
    <include name="LabelWidth">
        <include condition="StringCompare(Skin.AspectRatio,16:9)">LabelWidth-16x9</include>
        <include condition="StringCompare(Skin.AspectRatio,4:3)">LabelWidth-4x3</include>
    </include>
    <include name="ScreenWidth">
        <include condition="StringCompare(Skin.AspectRatio,16:9)">ScreenWidth-16x9</include>
        <include condition="StringCompare(Skin.AspectRatio,4:3)">ScreenWidth-4x3</include>
    </include>

    <include name="BackgroundWidth-16x9">
        <width>550</width>
    </include>
    <include name="BackgroundWidth-4x3">
        <width>345</width>
    </include>

    <include name="LabelWidth-16x9">
        <width>530</width>
    </include>
    <include name="LabelWidth-4x3">
        <width>335</width>
    </include>

    <include name="ScreenWidth-16x9">
        <width>1706</width>
    </include>
    <include name="ScreenWidth-4x3">
        <width>1280</width>
    </include>