Revert "App sidebar: notify if app is not installed"

This reverts commit 7206d9e619a3bbcf6020930eb6ea10a41dc8484a.
Revert "App sidebar: some adjustments"

This reverts commit 93f641d33604a07568a846448cbfa3cf458ce252.

Conflicts:
	packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java
Revert "App sidebar: floating window"

This reverts commit 20fc9a4c26f620c392783ea5c7a95819014ea8eb.
Revert "App sidebar (1/2)"

This reverts commit 24e19e991971d34f36a9fe1db7d9bafbbcb39ce3.

Conflicts:
	core/java/android/provider/Settings.java
	packages/SystemUI/AndroidManifest.xml
	packages/SystemUI/res/values/cr_colors.xml
	packages/SystemUI/res/values/cr_config.xml
	packages/SystemUI/res/values/cr_dimens.xml
	packages/SystemUI/res/values/cr_strings.xml
	packages/SystemUI/src/com/android/systemui/statusbar/BaseStatusBar.java
	packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java