setTitle() for setting the title of a window that will display when undocked.
setCurrent() for making the page and tree widget item of an object selected and
in the front of the stack.
+
+Closing
+Use the function closeStackPage() to close from within the class. Otherwise, if
+there are pointers which need to be deleted, use a destructor. The m_closeable
+page member will determine whether the option to close will appear in context
+menu of page selector.