ol-ext: Undo/redo

ol/interaction/UndoRedo is an interaction to handle undo/redo on a map.

Experimental this feature is still in progress and may be buggy.

Just add the interaction to the map to get it working. It will watch all vector sources and all interactions in the map.

Cancelable operations:
Cancelable interactions:

To add your own cancelable actions, look at this example.

Undo stack