Lockscreen: fix GlowPad overlapping the lower switches

Also added a check to allow disappearing options only in portrait

Change-Id: Ib30af4eed591d6835ba6ba46cd90509958a50d1e
Signed-off-by: Dirk Rettschlag <dirk.rettschlag@gmail.com>
Refactor Lockscreen fragment layouts

LinearLayout -> RelativeLayout
Also fixes issues on <xhdpi devices

Change-Id: I7b15728e21a705246526bc2867c1d860b03d93cb
Signed-off-by: Gergely Szell (sethyx) <szell@hu.ibm.com>