[kcmkwin/kwineffects] Rework the Effects KCM

Summary:
Use the same list style as the Virtual Desktops KCM and Kirigami actions with tooltips.
Also removes the info button. The copyright info can now be accessed by clicking on the item.

BUG: 409693
BUG: 335197
BUG: 335198

Test Plan:
Together with D22827:

Reviewers: KWin, VDG, filipf, GB_2, ngraham, davidedmundson

Reviewed By: KWin, VDG, filipf, GB_2, ngraham, davidedmundson

Subscribers: ngraham, GB_2, filipf, kwin

Tags: KWin, VDG

Maniphest Tasks: T10273

Differential Revision: https://phabricator.kde.org/D22830