IE pinch zoom improvements (touch only)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@29596 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
#3765: IconListBox as ListBox derivant.

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@29597 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
[cas] #3762 fix 

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@29598 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e