Code submissions have continually suffered from formatting
inconsistencies that constantly have to be addressed. Using
clang-format simplifies this by making code formatting more consistent,
and allows automation of the code formatting so that maintainers can
focus more on the code itself instead of code formatting.
This will help resolve incidents where users accidentally started or
stopped their stream without knowing what triggered it (usually from
hotkeys that were forgotten about).
This adds close buttons to remux dialog, output timer dialog, and
advanced audio properties dialog. I also did a small refactor of the
remux dialog so the buttons were consistent with other dialogs.
Closesjp9000/obs-studio#876
