readahead: add 8192 kB (user request)

Change-Id: I906e4b2c97539c1bb85c8c35abbde25bf2e73afa
check for path before adding toggle

Change-Id: I74e7739640062df5d0b0b12beb6a79b55cd7ead8
prevent animating when going from subfragment to drawer entry

 * also speed up animation time by 100ms

Change-Id: Ib026406b22818edafe88c4aacafe75db02ee1ac5