[r23085]Bug 701670: Command-V in reconcile window pastes data in register

Disable quartz accelerators: They grab menu accelerators without regard
to focus GtkWindows, breaking bindings.

git-svn-id: svn+ssh://svn.gnucash.org/repo/gnucash/branches/2.4@23086 57a11ea4-9604-0410-9ed3-97b8803252fd