* CMake: Remove dead CODE_HEADER_FILES variable
* CMake: Remove dead COMMAND_CODE_HEADER_FILES and COMMAND_MOC_SOURCE_FILES
* CMake: Remove dead MOC_SOURCE_FILES and FORM_FILES_CPP references
* CMake: Remove dead HEADER_FILES reference
* CMake: Delete unused CustomPCH.cmake superseded by target_precompile_headers
* Fix overwrite of value thresholds
* Fix performance issue with filtered values
* Add "Delete All Polygons" from the polygon collection
* Add area threshold where user can specify area cutoff
* 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