Revert "App sidebar: floating window"

This reverts commit 0bf363a761923d01057e9ed61d8fda82c1379e3b.
Revert "Squash sidebar commits from ChaOS [1/2]"

This reverts commit 8b5423f523dc94fb9ab333eb6f8615ee69938480.

Conflicts:

	packages/SystemUI/res/values/jisoo_dimens.xml
	packages/SystemUI/res/values/jisoo_strings.xml