Warnings general

I've spent some time to fix warnings, I think they get in the way of you reading important things on screen.
So I've just finished a lot of changes that can help clearing space.

XCode

No warnings anymore after the following PRs are merged. I think they can be reviewed and merged as one.
cc: @ofTheo @2bbb @danoli3

• https://github.com/openframeworks/openFrameworks/issues/7392
• https://github.com/openframeworks/openFrameworks/pull/7083
• https://github.com/openframeworks/openFrameworks/pull/6935 - https://github.com/openframeworks/openFrameworks/issues/6925
• https://github.com/openframeworks/openFrameworks/pull/7026
• https://github.com/openframeworks/openFrameworks/issues/6977
• https://github.com/openframeworks/openFrameworks/issues/6926
• https://github.com/openframeworks/openFrameworks/pull/6927
• https://github.com/openframeworks/openFrameworks/pull/6937
• https://github.com/openframeworks/openFrameworks/pull/6921
• Removing QTKit as a framework
• https://github.com/openframeworks/openFrameworks/pull/6924
• https://github.com/openframeworks/openFrameworks/pull/6922
• https://github.com/openframeworks/openFrameworks/pull/6995

General code

• https://github.com/openframeworks/openFrameworks/pull/6880
• https://github.com/openframeworks/openFrameworks/pull/6916
• https://github.com/openframeworks/openFrameworks/pull/6877
• https://github.com/openframeworks/openFrameworks/pull/6878
• silence OpenGL deprecation
• https://github.com/openframeworks/openFrameworks/pull/6918
• https://github.com/openframeworks/openFrameworks/pull/6917

Related

And other thing that can be fixed soon is this (int to size_t convesion):

• https://github.com/openframeworks/openFrameworks/issues/6866#issuecomment-1061906274
  Silence temporarly this hundreds of messages :

Review the remaining XCode item, issue #7392, and the referenced pull requests and issues to determine whether any warning work is still open. The issue lists no files or tests, and most proposed changes are already checked off or handled elsewhere; done would require identifying and resolving any remaining warnings.