Allows making QPushButtons use the QToolButton styling.
Current usage is for transitions dock buttons.
May be unneeded after #6756 but doesn't hurt to have
Theme Meta allows individual themes to provide additional information to
OBS.
The primarily goal is for a theme to define a "parent", allowing to
extend existing themes with additional attributes.
This change introduces an accessibility menu to settings, along with
options for overriding the colors used by OBS in the mixer and in the
preview to be more color blind friendly than the options provided by the
current theme.
Removes font-family definition for now, and changes
other font sizes to pt units instead of px
Also adds a margin to the SceneTree/SourceTree line
edits to fix qss padding weirdness
