Added "mode_switcher" to offer playing one video (default), loop single video, or autoplay all videos
Changed pinning size of window (and videos) at search to having two fixed sizes and snapping to them based on the threshold set
Adding clamping around video box from those two snapped sizes
Adding dynamically resizing video thumbnail pixbuf based on resizing
Restored error messages (from previous switch adding playlists) to use a "lists_stack" that includes the error message stack
Added '{' and '}' keystrokes for speed adjustments stub
Replaced 'Autoplay' toggle for "mode switcher" toggle buttons
Replaced 'Speed' button with 'Share' button stub (to be added later)
Added a size-allocate handler to determine if resizing window crosses threshold to resize results
Changed default app size to 960x720
Added default thresholds to .ui files for clamping text overrun...