Ensure no frames are dropped in GLWidget if non-realtime.
Fix regression in 96942d2 on widths already multiple of 8.
Add 3D Text filter.
Fix using animation script with Overlay HTML filter.

WebVfx needs filter duration defined by in/out to pass a valid time to
the render callback.
Fix initialization of Text filter.
Mix transition is not needed for video4linux with audio.
Add DirectShow to Open Other dialog on Windows.
Save XML with relative filenames for files in the XML's folder.
Initial proof-of-concept for QML filter view and favorite filters
Improve filter menu size and placement
Fix filter view visibility
Implement filter view flow based on dock orientation
Better handling of filter removal - prevent crash
Toggle enable state on filter double click
Add DnD filter reorder
Remove from filter model directly rather than through signals
Set current filter when it is added
Connect fade in/out duration change to filter configuration
Reset filter view when theme changes.
Improvements to filter menu