Fixed date of latest measurement in bottlenecks list. As the time zone conversion done by geoserver leads to unexpected results for date fields if the local timezone differs from UTC, I replaced the date column in the bottleneck_overview view with text. As the transport format used (JSON) does handle dates as strings anyway we do not loose any information by doing so...

teichmann@intevation.de = sascha.teichmann@intevation.de