codemirror autocomplete more

enabled context aware autocomplete for mixed mode ( improvements
probably still can be made here, custom GS stuff, etc)

fullscreen notifications available now

moved more codemirror stuff into plugin and made instance specific
reworked styles

GSSTYLEWIDE and GSSTYLEFIXED are now defaults
can still be disabled by setting GSTYLE to nothing or just one.

new way to set page widths, normal and special wide for select core
tabs.