QtTools: Doc: Fix lots of links in the designer manual.
QtTools: Doc: Fix lots of links in the designer manual.

Change-Id: I7ae1e9b56f6066798ca8620d96bf42f991b1064d
Reviewed-by: Jerome Pasion <c10995d24f6b454503389e8d00d837aef038985d@digia.com>
Reviewed-by: Leena Miettinen <885fda02d52616fec24ed5fed9b3f0568fce3ead@digia.com>

mer-qt/qttools,mer-qt/qttools,mer-qt/qttools,mer-qt/qttools,mer-qt/qttools,mer-qt/qttools