Preview lockscreen preview image in detail view

Change-Id: I9b2c87de906723aedf49833fac9d00f3b5d698a3
Don't add applied components and disable their checkboxes

Unchecking checkboxes for applied components makes no sense as there
is no "un-apply" functionality. The Apply button will also be enabled
which can only cause confusion.

Change-Id: Ib193f9640e609b581c7a15f4b60b81866f50eeae

Conflicts:
	src/org/cyanogenmod/theme/chooser/ChooserDetailFragment.java
Move checkboxes for applied components under a 'Applied' header

Makes it clearer that the components are already applied.

Change-Id: If41e6eee30671aa3b49314a28681731b989ff248