Merge topic 'AddMultiLineWidget'

cb10f410 A complete test application for the broken line widget
4876c57a A simplified version
aee805ff A version of the interactive selector that works
9c03a224 Testing checkpoint before major overhaul
630217cb Adjust radius in example; format source
3e7d8af1 Added a HandleSizeFactor to control handle radii, and Set/Get methods
92af931d Improved test to generate and render selection in 2nd viewport
880505c2 VTK indent style fix
b10cd3e6 Create 2 linked views in BLW test (one for mesh, other for selection)
29d3018b A test for the broken line widget
96f00b6f Forgot to commit the source file!
7f8b68a0 A broken line widget that works almost completely
92aceaa8 Removed debug statements and did some reformatting
abb9d67c Renaming Python example for clarity
456dc3c5 A modified line source with 2 APIs.
020d8c7e An example illustrating the 2 APIs for point source
...