BUG: fix compilation of failing test for VTKv5

The test always returns fail now on purpose to indicate
that this functionality is not available.

git-svn-id: http://svn.slicer.org/Slicer4/trunk@23778 3bd1e089-480b-0410-8dfb-8563597acbee
ENH: Added "Enable developer mode" option to ExtensionWizard

Developer mode is quite important for scripted module developers, as
it enables showing of the "Reload and test" section in scripted module
GUI.

To make sure developers not forget to enable developer mode, added a
checkbox to enable developer mode to the scripted module auto-load dialog.
The checkbox is checked by default and it is only shown if developer mode
is not enabled already.

From: Andras Lasso <lasso@queensu.ca>

git-svn-id: http://svn.slicer.org/Slicer4/trunk@23779 3bd1e089-480b-0410-8dfb-8563597acbee
STYLE: Associate a pimpl to qSlicerCLI{Executable, Loadable}ModuleFactory

This is done in anticipation of future tweaking of the factory related
to integration of CTK CLI framework.

git-svn-id: http://svn.slicer.org/Slicer4/trunk@23780 3bd1e089-480b-0410-8dfb-8563597acbee