Fix error from previous commit

Fix bug from previous commit “Fix Activity starting out unsnapped if it
was previously resized”

Apparently activity.getIntent().removeExtra is not applying. We do a
workaround instead.
Add "Galaxy Note 3"-like multi window dragger menu
Add New Titlebar icons (by @BachMinuetInG)
Add Snapped Apps List. (Access from the SplitBar buttons)

A list that shows the corresponding side’s snapped apps and allow
switching and killing
Change the SplitBar to use DPI in build.prop instead of per app DPI