Passing the parent of a QLayout sets it directly as the top-level layout
(as per the QLayout docs). This is obviously not what is intended here.
Luckily it doesn't even work since the main window of course already has
a layout which would need to be explicitly removed before, but it makes
Qt yell at us for trying.
Adds support for pausing recordings. When settings are eligible for
recordings, a pause button will appear next to the recording button. If
the settings are not eligible, it will warn the user in the output
settings that they cannot pause recordings if those settings are used.
