InputDialogW message panel fixes

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@31587 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
removed unneeded constructor from InputDialogW

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@31588 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e