Win8 app: make sure that doubles returned from events are rounded

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@29645 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Tidying up [29642], needs backport.

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@29646 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
#3765: ImageList using Unmordered list - no event handling yet

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@29647 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
4.9.226.0

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@29649 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e