Put in this global behavior modifier into Configuration Tab > System Settings > Global Behavior Modifiers
monitors.orphan.enable = 1
After this, editing your monitors will have a "Move to Orphaned Objects" in the toolbar (depending on your screen size, you may have to scroll to see it). This is the other way to do it without cut and paste.
I have done that, but I was looking for an easier method to bulk move 100+ monitors from one device to Orphaned Objects, rahter than having to Edit each monitor individually....Like wihtin my listing of monitors, if I could click the boxes next to all monitors I want to move, then have a selection for "Move to Orphaned Objects".