Properly display domain preferences in full list.
Improve visual layout of preference list.
Disable drop-downs in preference list.
Implement first part of editing domain preferences.

Show form accordig to preference type. Still doesn't save
correctly and lacks support for max_occur=0 cases (e.g.
lists of strings).
Clean up Settings menu for admin.
Some more fix attempts for dom-prefs, WIP.
Fix prefill and update of preferences.