Bug 301133 Unhide the linked resources locations tab in the Linked Resources property page
The mentioned tab was hidden in M5 since it needed polishing. There are new icons in the page, so when this bug is fixed, I will raise another one to track creating new icons by our UI designers.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/ide/dialogs/ProjectLinkedResourcePage.java
/**
     * Empty implementation. This page does not use the workbench.
     * @param workbench 
     * 
     * @see IWorkbenchPreferencePage#init(org.eclipse.ui.IWorkbench)
     */
    public void init(IWorkbench workbench) {
    }
    /**
     * Commits the temporary state to the path variable manager in response to user
     * confirmation.
     * 
     * @see PreferencePage#performOk()
     * @see PathVariablesGroup#performOk()
     */
    public boolean performOk() {
        return pathVariablesGroup.performOk() && linkedResourceEditor.performOk();
    }
    /**
     * Set the widget enabled state
     * 
     * @param enableLinking the new widget enabled state
     */
    protected void updateWidgetState(boolean enableLinking) {
        topLabel.setEnabled(enableLinking);
        pathVariablesGroup.setEnabled(enableLinking);
        linkedResourceEditor.setEnabled(enableLinking);
    }
}