[Stack and Tile] Add option for full-width tabs
|Reported by:||NullAndVoid||Owned by:||czeidler|
Description (last modified by )
In some situations, full width tabs can be beneficial or preferred by the user.
Two examples of MediaPlayer with full-width tabs, one with the playlist without a tab.
This option should also apply to a group of stacked tabs, meaning several tabs from stacked windows should be able to fill the full window width (see second example in #7868). If not enough room, a drop-down menu or similar with tabs that do not fit is listed.