Clean Geometry History

Opening a project with a large number of nodes will notify the user that the history can be cleaned. Currently, automatic notification happens with at least 100 entities or at least 4 operations in sequence. History removal can also be run from Geometry > Clean Geometry History. Below is an example of a significant improvement in clean history that reduces the time it takes to open the project with RAM usage.

	RAM use (MB)	Time to open project (s)
Before cleaning history	21,498	102.8
After cleaning history	4,315	18.5