Revert "Change to PA custom drawables for Themes icon"

This reverts commit dc74cd3aef3c3c60cae53576ae212c52068c5b81.
Revert "Fix"

This reverts commit 084c9f88ead3dc334ecb0ac726e4294b49a9f551.
Revert "TE: String derp"

This reverts commit 96c95f0eb02aab9eff78ea6ed37e57d81734ee8f.
Revert "THEME ENGINE (2/2)"

This reverts commit e8896f10a772bf0e32f86d533e82fb8131bb0cef.