Organize attached filters by type
Insert new filters after filters of similar type
Separate GPU and video filters in the menu. Allow GPU and non-gpu filters to be used at the same time
Improve current filter selection upon add and remove
Various visual improvements
Code style improvements
Code cleanup
Return empty string if no ui.qml or vui.qml file exists to avoid warning messages.
Remove unnecessary includes.
Add ui.qml files that are missing from some metadata.
Fix filters not being initialized when added.
Fix encoding with Movit and WebVfx used together.
Permit loading MLT XML that uses GPU and CPU filters.