Collection Manager: Small improvement. Task:T69577

Prevent the 'Expander' operators from being added to the undo stack
because they can't be undone properly and only add clutter.

object_collection_manager/__init__.py

@@ -22,7 +22,7 @@ bl_info = {
     "name": "Collection Manager",
     "description": "Manage collections and their objects",
     "author": "Ryan Inch",
-    "version": (2, 12, 0),
+    "version": (2, 12, 1),
     "blender": (2, 80, 0),
     "location": "View3D - Object Mode (Shortcut - M)",
     "warning": '',  # used for warning icon and text in addons panel

object_collection_manager/operators.py

@@ -100,7 +100,6 @@ class ExpandAllOperator(Operator):
     '''Expand/Collapse all collections'''
     bl_label = "Expand All Items"
     bl_idname = "view3d.expand_all_items"
-    bl_options = {'REGISTER', 'UNDO'}
 
     def execute(self, context):
         global expand_history
@@ -131,7 +130,6 @@ class ExpandSublevelOperator(Operator):
         "  * Alt+LMB - Discard history"
         )
     bl_idname = "view3d.expand_sublevel"
-    bl_options = {'REGISTER', 'UNDO'}
 
     expand: BoolProperty()
     name: StringProperty()