Propagate the ViewMenu Tooltip from the E4 model to the UI

Currently all ViewMenus have the same tooltip "View Menu" even if there
is a name or tooltip defined in the E4 Model. This is because the
constant string is set once and never updated.

This now properly reads the values from the model and falls back to the
old one if nothing is specified.

Author: laeubi

bundles/org.eclipse.e4.ui.workbench.renderers.swt/src/org/eclipse/e4/ui/workbench/renderers/swt/StackRenderer.java

@@ -908,12 +908,21 @@ public void adjustTopRight(final CTabFolder tabFolder) {
 		// We need to modify the 'exclude' bit based on if the menuTB is
 		// visible or not
 		RowData rd = (RowData) menuTB.getLayoutData();
+		ToolItem item = menuTB.getItem(0);
 		if (needsMenu) {
-			menuTB.getItem(0).setData(THE_PART_KEY, part);
+			item.setData(THE_PART_KEY, part);
 			rd.exclude = false;
+			String tooltip = viewMenu.getTooltip();
+			if (tooltip == null) {
+				tooltip = viewMenu.getLabel();
+			}
+			if (tooltip == null) {
+				tooltip = SWTRenderersMessages.viewMenu;
+			}
+			item.setToolTipText(tooltip);
 			menuTB.setVisible(true);
 		} else {
-			menuTB.getItem(0).setData(THE_PART_KEY, null);
+			item.setData(THE_PART_KEY, null);
 			rd.exclude = true;
 			menuTB.setVisible(false);
 		}