Remove the export kml button in IE9

Fix for https://github.com/geoadmin/mf-geoadmin3/issues/1866

(IE9 does not support file save functionality and thus can't export kml. Note however, that a drawing can be send by email in the feedback tool)
Sorry I've seen a AND icondition instead of OR . In that case  `!gaBrowserSniffer.msie`  should be more readable