void showTabList() {
		if (tabList != null) {
			return;
		}
		JComponent c = hasHiddenTabs() ? hiddenValuesControl : allTabs.get(allTabs.size() - 1);
		tabList = new TabListPopup<>(this, c, tabTypeName);
		tabList.setVisible(true);
	}
Returns the value of the tab that generated the given mouse event. If the mouse event
is not from one of the tabs, then null is returned.
@param event the MouseEvent to get a value for
@return the value of the tab that generated the mouse event
Ghidra/Framework/Docking/src/main/java/docking/widgets/tab/GTabPanel.java