* Add polygon reader for POL file format
* Add CSV import
* Add helper function to create tag with color and text
* Show polygon color as tag, allow color edit by clicking on tag
* Support optional header in csv file
* Add Reload on polygon file
* Show warning icon if no polygons
* Improve logging text
* Do not show file polygon in view if no polygons are imported
* Use appendMenuItems
* Set default polygon color to orange
* Enter edit state when creating a new polygon
* Fix missing UI text in menu builder
- Use polygon as data source for intersection
- Add padlock icon
- Show padlock icon on read only polygons
- Add Fwk function appendMenuItems() to make it possible to define context menu content in a PdmObject
- Context menu "Create Polygon Intersection"
- Updates to make visualization consistent with object and object collection enabled state
