#3977: [desktop] Offline mode without login and OpenFromGGT 
- Fixed: If the test request to check if tube is available finished after the Open From Tube-Menu was drawn it was never drawn.

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@31135 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e