Fix pageMargin in PagedTileLayout

Page margin was being set again from inside PagedTileLayout. Only set at
QSContainerImpl level, based on margins.

As the controller calls updateResources on view attached, they will get
set correctly as soon as the view is attached.

Test: manual
Fixes: 186863859
Change-Id: I8a9f22cc35899ba081bd94c48b3647fc7ae89829