to improve performance
* src/PlaceView.py: set the cell renderers to a fixed size
to improve performance
* src/SourceView.py: set the cell renderers to a fixed size
to improve performance
* src/Sources.py: set the cell renderers to a fixed size
to improve performance
* src/Utils.py: set the cell renderers to a fixed size
to improve performance
* src/gramps_main.py: prevent double loading of place_view
svn: r1931
