To prepare for translation support, this makes all of the widgets
cognizant of the language change event that occurs whenever
installTranslator() is called and automatically retranslates their text
where necessary.

This is important as calling the backing UI's retranslateUi() is often
not enough, particularly in cases where we add our own strings that
aren't controlled by it. In that case we need to manually refresh the
strings ourselves.

A checkbox is able to be tri-state, giving it three possible activity
types, so in the connect call here, it would actually be truncating an
int into a bool.

Instead, we can just listen on the toggled() signal, which passes along
a bool, not an int.

Compatibility profile and the disk shader cache settings shouldn't
be changed at runtime. This aims to address that shadowing those
options.

This option allows picking the compatibility profile since a lot of bugs
are fixed in it. We devs will use this option to easierly debug current
problems in our Core implementation.:wq

- This will be used as a catch-all for slow-but-accurate GPU emulation paths.

These aren't used outside of this translation unit, so they can be
internally linked.

Makes code consistent with our style of defaulting special member
functions where applicable.

* implement frame limiter

* fixes

Also minor style changes

Allows users to choose a single screen layout or a large screen layout.
Adds a configuration option to change the prominent screen.

This makes clang-format useful on those.

Also add a bunch of forgotten transitive includes, which otherwise
prevented compilation.