ENH: ctkConsole: Restore positions after building the completion model
ENH: ctkConsole: Restore positions after building the completion model

Since some implementation of updateCompletionModel (e.g python)
can display messages while building the completion model, it is
important to save and restore the positions.

commontk/CTK,commontk/CTK,jcfr/CTK,jcfr/CTK,commontk/CTK,CJGoch/CTK,SINTEFMedtek/CTK,SINTEFMedtek/CTK,CJGoch/CTK,jcfr/CTK,jcfr/CTK,SINTEFMedtek/CTK,commontk/CTK,CJGoch/CTK,CJGoch/CTK,SINTEFMedtek/CTK,CJGoch/CTK,SINTEFMedtek/CTK,jcfr/CTK