Model/Record: don't assume a "state" field is a scalar type

A "state" field could be a many2one or anything, don't hard-code
an assumption about chars.
spellchecker: tolerate enchant TokenizerNotFound errors

For some languages/setups, they may happen, just don't waste the
Text field because of that.
all: some cleanup, expand a few tabs
Group,Record,Screen: late commit, small improvements

.. or breakage?
OpenOffice: disable loading the libraries

Saves us a lot of loading time
TreeWidget: have "other actions", popup with model actions_multi