Problem:
Each Property Box has Go Back and Go Forward white arrow buttons in the toolbar to traverse a history list.
Currently, if an item in the history list is deleted either the whole history list is purged or the buttons malfunction.

Proposal:
The Property Box Go Back and Go Forward buttons should continue to traverse the history list rationally if an item in the list is deleted.
For example, deleted items in the history list should be skipped but the rest of the list retained.