Ensure QQS does not clip tile views.

- Remove qs_quick_tile_space_width resource in favor of specifying the
max size for QQS when the notification panel's size is large enough.

Change-Id: I6a3ee05fa20d6e8f8f4bd688d310de6a242d26f9
Fixes: 110276500
Test: manually changing window density/size and viewing QQS