When loading QTAIM files, switch to the navigate tool.
When loading QTAIM files, switch to the navigate tool.

Fixes PR#687.
Consistent with normal Open.. or Import.. behavior.
Also switched menu items to include "..." to indicate
they open new files, consistent with UI elsewhere.

Change-Id: I8eb0f87155748a370bd842cdfe1b049a504f343c

wadejong/avogadrolibs,cjh1/mongochemweb-avogadrolibs,ghutchis/avogadrolibs,wadejong/avogadrolibs,ghutchis/avogadrolibs,wadejong/avogadrolibs,OpenChemistry/avogadrolibs,OpenChemistry/avogadrolibs,cjh1/mongochemweb-avogadrolibs,ghutchis/avogadrolibs,cjh1/mongochemweb-avogadrolibs,ghutchis/avogadrolibs,OpenChemistry/avogadrolibs,OpenChemistry/avogadrolibs,wadejong/avogadrolibs,OpenChemistry/avogadrolibs,ghutchis/avogadrolibs,cjh1/mongochemweb-avogadrolibs