menu info:
 * Mark channel as favorite/Unmark channel as favorite
 * add channel %Channel name% to group
   * new Group -> prompt for a new group name
   * Group 1
   * Group 3
Show only the group where the channel is not part of

 * remove channel %Channel name% from group (only available when the channel is already in a group a part from favorites)
   * Group 2
   * Group 4
Show only the group where the channel is part of

When a channel is removed, if the group does not have any other channel in it, we delete it automatically