Have (almost) all preferences use the generic preferences API (per https://bugs.wires...

Have (almost) all preferences use the generic preferences API (per https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=7402).  This cleaned up a lot of hardcoded code and allows breaking up the prefs structure (or at least prevent it from growing too large) if desired.

Bugfixed problems mentioned in
http://www.wireshark.org/lists/wireshark-dev/201208/msg00001.html

Column preferences now support default '#' character

git-svn-id: http://anonsvn.wireshark.org/wireshark/trunk@44348 f5534014-38df-0310-8fa8-9805f1628bb7