Fixed #3745: File->Share always opens GeoGebraTube in English

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@29479 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
#3631 null bug corrected (already backported)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@29481 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
#3691 refactoring part II to boolean models and panels, both desktop and web. Web Basic tab panels complete.

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@29482 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e