wenzelm [Thu, 29 Aug 2013 12:38:33 +0200] rev 53274
maintain Completion_Popup.Text_Area as client property like Document_View;
global Completion_Popup.Text_Area init/exit like SideKickPlugin;
eliminated old SideKick completion -- cover all Isabelle modes uniformly;
dynamic lookup of Isabelle.mode_syntax -- NB: buffer mode might be undefined in intermediate stages;