Update form labelling so that control panel table structure can be same as live/staging; commit synced with https://github.com/cusu/bob-gui/commit/6e0ed42bd97c3eeeec99fee8f639d8c6d0ed29f5
Set referendum threshold range to be 0-99 (removes inconsistency between controlpanel (which was always 2) and staging/live (which were 3); commit synced with https://github.com/cusu/bob/commit/2fcf917bb5c7bab54cfd211263771c15f2cf87aa