Revert "Slim Recents: (add support for floating window)"

This reverts commit 3553d6881cb249961c982a3de186b05812b78fd0.
SlimRecents: development shortcut

https://github.com/CyanogenMod/android_frameworks_base/commit/016664aa129ff00b556a6c56e06f474593d1a04f

Change-Id: Id813e25cbe4c414bf039385a710775e9b30b7162
SlimRecents: add floating window menu

Change-Id: I63894fb8551b881c45c991bc30353b3dc4f3e43c

Conflicts:
	packages/SystemUI/res/values/cm_strings.xml