Commit [r23517] Maximize Restore History

Got rid of old 'future plans' since we really want to focus on

completion plugin for enhancemnet rather than duplicate effort
in sidekick's completion API.
See https://sourceforge.net/p/jedit/plugin-feature-requests/240/
and https://sourceforge.net/p/jedit/plugin-feature-requests/335/

ezust 2014-04-24