Replace location icon by back and home text

Display "home" when page opened is not an event/feedback or floorplan
or if the poped page would be the home page (page depth equal to two).

Location.svg is not used anymore, removing it.

Change-Id: I990d330a61e3f58392b8077c4f073044df7399be
Reviewed-by: Niels Weber <niels.weber@digia.com>