private void hidePopupTooltips() {
		if (popupWindow != null && popupWindow.isShowing()) {
			popupWindow.hide();
			// don't call dispose, or we don't get our componentHidden() callback 
			// popupWindow.dispose();
		}
	}
Sets the enablement of this class's popup
@param visible true to have popups enabled
Ghidra/Framework/Graph/src/main/java/ghidra/graph/viewer/popup/PopupRegulator.java