This is for consistency reason as the lib/dtutils/file.lua use this
directory. Also all translation into contrib where not usable as
not checked into this directory which was expected to be just lua.
All in all using locale directory will avoid clutter the main
directory with all possible languages and fixes the current scripts.
As we are on the quicktag module it seems quite obvious that we are
handling quicktag. So let's just use "tag" instead of "quicktag", this
is a bit smaller and it saves spaces on the widget. This ensure that
the whole module is visible in most cases (panel size, font size...).
* long tags are stil a problem
* maybe two colums of tag buttons saves high, if someone wants to have many tags
* option to create non existing tags will be nice I guess
