Gui cleanups:

 - set buddies for line edits
 - set layout spacing to 6pt through out to remove that scrunched up look
 - set tab order to something other than random :-)



git-svn-id: http://svn.osgeo.org/qgis/trunk@5769 c8812cc2-4d05-0410-92ff-de0c093fc19c