Slim Recents: Option to show topmost task [1/2]

Change-Id: Ib39d9b87b0fd30b4d34d4292af39e891038f337a
Slim Recents: Always show topmost task collapsed

PS2: Also restore expanded state of topmost task when on homescreen
PS3: Fix code style

Change-Id: I64956410fb389d8e880979a84b51321d8b372217