Keep things sorted alphabetically in CMakeLists.txt
Summary:
Currently component names and filenames are partially sorted. This makes adding
new items and finding existing items more difficult.
Test Plan: Compiles.
Reviewers: KWin, gladhorn
Reviewed By: KWin, gladhorn
Subscribers: kwin
Tags: KWin
Differential Revision: https://phabricator.kde.org/D24018