Prune three or four layers of complicated code that is only ever used to

[David Hampton]

Log Message:
-----------
Prune three or four layers of complicated code that is only ever used
to extract a single value from an account.

Tags:
----
gnucash-gnome2-dev

Modified Files:
--------------
    gnucash/src/app-utils:
        gnc-ui-util.c
        gnc-ui-util.h
    gnucash/src/gnome-utils:
        dialog-account.c
    gnucash/src/scm:
        main-window.scm