COMP: Update version PythonQt to integrate latest fixes

The "patched-3" branch is rebased against r244 of PythonQt, it integrates
all backported changes specific to "patched-2" and also
include improvements by the upstream team. For a detailed list,
see https://github.com/commontk/PythonQt/compare/e2dce4...0a2486

git-svn-id: http://svn.slicer.org/Slicer4/trunk@21847 3bd1e089-480b-0410-8dfb-8563597acbee