theme: Erase appDisplay padding

Since now AllView doesn't have a scrollbar this
padding is not necesary, and will allow to place
the indicators correctly using only the indicators
padding in a upcoming patch.

https://bugzilla.gnome.org/show_bug.cgi?id=707580
appDisplay: Fix indicator animation position

The original position was calculated with the stage and the
transformed position of the indicator when mapped. The values
were wrong on some situations, so lets calculate the position
based on the dots width.

https://bugzilla.gnome.org/show_bug.cgi?id=707580