Remove keep mouse centered (#20268)
fixes #20200
fixes #20195
Summary of the issue:
The option to keep mouse centered on the screen was originally my idea but is bringing more nuisance, and not much use.
As talked with @CyrilleB79, the best solution would be to remove it and replace this idea with the gesture that he worked on #20238
Description of user facing changes:
won't be able to keep mouse centered on the screen anymore
Description of developer facing changes:
Keep mouse centered options/functions/variables/tests have been removed
