Bug 125011 [Contributions] ActionContributionItem should use text for tooltip in toolitems
If an action is added to a toolbar, and it has a name, but no tooltip set, the name should be used as the tooltip (except when the text is actually displayed on the toolitem using setText()) Clients sometimes forget to set the tooltip text when no specific tooltip message exists.
bundles/org.eclipse.jface/src/org/eclipse/jface/action/ActionContributionItem.java
if (tooltipTextChanged)
                    button.setToolTipText(action.getToolTipText());
                if (enableStateChanged) {
                    boolean shouldBeEnabled = action.isEnabled()
                            && isEnabledAllowed();
                    if (button.getEnabled() != shouldBeEnabled)
                        button.setEnabled(shouldBeEnabled);
                }
                if (checkChanged) {
                    boolean bv = action.isChecked();
                    if (button.getSelection() != bv)
                        button.setSelection(bv);
                }
                return;
            }
        }
    }
    /**
     * Updates the images for this action.
     *
     * @param forceImage <code>true</code> if some form of image is compulsory,
     *  and <code>false</code> if it is acceptable for this item to have no image
     * @return <code>true</code> if there are images for this action, <code>false</code> if not
     */
    private boolean updateImages(boolean forceImage) {
        ResourceManager parentResourceManager = JFaceResources.getResources();
        
        if (widget instanceof ToolItem) {
            if (USE_COLOR_ICONS) {
                ImageDescriptor image = action.getHoverImageDescriptor();