Revert "Auto-close if you swipe away the last notification."

This reverts commit 8cc36e572876f3bb9197f0109db3042466e5f917.

It didn't work as advertised anyway: It only worked if there are no
persistent notifications, and it also closes the notification area if
the notification is closed by the app itself.

Change-Id: I16f0fb6cf41d20c3a3bd4278446edab780c1fc77
Fix little derp causing visual bug

To reproduce, disable halo, and press "clear all notifications" button

Change-Id: Ice7ab62229e27db53ef51fd5df55dbcd0a86358b
Signed-off-by: Dan Trifan <jimsth@gmail.com>
halo: fix notifications

Change-Id: Iebe7f77d16a6cd9e28bd979b88cfe76d84e40c04
Signed-off-by: Dan Trifan <jimsth@gmail.com>