Rename the search type menu items to more accurately reflect what we're

Rename the search type menu items to more accurately reflect what we're
actually doing and what users are likely to want to do.  Rename the
search enum values and functions to reflect what we're actually doing
and add a comment explaining why making searches more correct might make
searching worse.  Add a search bar to the Qt main window, thus
continuing the War On Gratuitous Dialogs.

Clear out any previous temporary label stack items before adding a new one.

svn path=/trunk/; revision=46541