public DockingWindowManager getOwningWindowManager() {
		return owningWindowManager;
	}
Creates a default parent frame that will appear in the OS's task bar.  Having this frame
gives the user something to click when their dialog is lost.  We attempt to hide this
frame offscreen.

Note: we expect to only get here when there is no parent window found.  This usually
only happens during tests and one-off main methods that are not part of a
running tool.

@return the hidden frame
Ghidra/Framework/Docking/src/main/java/docking/DockingDialog.java