public void updateState() {
			updateAddButtonState();
			updateRemoveButtonState();
		}
Ensures that all buttons are enabled/disabled appropriately based on the current
selections.
<p>
Note that the "add all" and "remove all" buttons are always enabled so they aren't addressed
here.
Ghidra/Framework/Project/src/main/java/ghidra/framework/main/ProjectAccessPanel.java