Merge setting up abstractclient and x11client connections in EffectsHandler
Summary: Toplevel::paddingChanged() is not an X11-specific signal.
Test Plan: Relevant tests still pass.
Reviewers: KWin, apol
Reviewed By: apol
Subscribers: apol, kwin
Tags: KWin
Differential Revision: https://phabricator.kde.org/D29520