ENH: Updating SimpleFilter remote module

This updates adds a check box to set output as LabelMap, A Restore
defaults button, and print of filter to be run in python code to set
filter.

$ git log --oneline fc1f06..3bc2f
3bc2fdc Adding button "Restore" defaults
0d27412 ENH: improving responsiveness of main_queue_process
51d14b7 STYLE: move apply bottom to match CLI interface
49ec882 ENH: print object oriented python code to create filter before running
5d0a528 ENH: When a labelmap input is selected the output changes to labelmap
aa7ddc5 Update node selector and checkbox with LabelMap state
d4a5116 move output box and labelmap checkbox to self variables
648f736 Adding CheckBox to set output volume as label map

git-svn-id: http://svn.slicer.org/Slicer4/trunk@22857 3bd1e089-480b-0410-8dfb-8563597acbee
BUG: avoid a warning dialog in Editor when scene is closed

The warning message was triggered because the validity of the
volume state is checked when nodes are added or removed from the
scene, but it doesn't make sense to warn about the missing master
volume if there is also no merge volume.

Thanks to Alexandra Prior for pointing this out.

http://slicer-users.65878.n3.nabble.com/Editor-td4027182.html

git-svn-id: http://svn.slicer.org/Slicer4/trunk@22858 3bd1e089-480b-0410-8dfb-8563597acbee
BUG: #3568 Fix warning message about missing files

git-svn-id: http://svn.slicer.org/Slicer4/trunk@22859 3bd1e089-480b-0410-8dfb-8563597acbee