Collapse knowledge of desktop gconf keys into a single file.

[David Hampton]

Log Message:
-----------
Collapse knowledge of desktop gconf keys into a single file.

Tags:
----
gnucash-gnome2-dev

Modified Files:
--------------
    gnucash/src/business/business-gnome:
        dialog-billterms.c
        dialog-invoice.c
    gnucash/src/core-utils:
        gnc-gconf-utils.h
    gnucash/src/gnome:
        gnc-split-reg.c
        window-main.c
        window-reconcile.c
        window-register.c
    gnucash/src/gnome-utils:
        gnc-mdi-utils.c