@Override
		public void setSelected(boolean selected) {
			getToolBarData().setIcon(selected ? NO_BYTE_DIFFS_ICON : BYTE_DIFFS_ICON);
			super.setSelected(selected);
		}
Update the enablement of the actions created by this manager.
@param isShowing true indicates that the dual listing diff is currently visible on screen.
Ghidra/Features/Base/src/main/java/ghidra/features/base/codecompare/listing/ListingDiffActionManager.java