View: Show correct progressbar also for Mission, Fence and Rally

[fredowski]

The progressbar is updated with the actual progress for Mission-, Fence- and Rallypointdownload.

Without the patch the progressbar is only updated for each particular step when it is at 100% and the initial connect statemachine advances. The progress information is already available but it was not used. For slow connections the mission download with many mission items can take quite a while and the progressbar does not indicate the progress without this patch.