Big upgrade on filtering in the location table!

• More intuitive UI and much faster filters
• Filter by search
• Filter by conducted date (To: - From:)
• Export: Support for filtering during export of data in several formats: 
  • KOF, SND, XLS and CSV. (Does not support GeoJSON, KML/KMZ or rawdata-files)
• Static plot: Methods filtering allows users to plot only selected methods.