Remove overloads on virtual methods

Summary:
Prefer virtual methods that take QRect and QSize rather than multi-int versions.
Makes for clearer API and reduces the amount of code that was taking all of the
components and turn it into a class.

Reviewers: #kwin, zzag

Reviewed By: #kwin, zzag

Subscribers: zzag, kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D28283