Change in workflow

[elma13]

continuing from #270, maybe a different approach is more useful:

1. first see all the data and set a maximum value to exclude 'outliers', get a first feeling of the measurements and there min and max

2. select data on the map and creates groups. This is an useful approach if you have many sensors and use their combined power. Probably you are interested in a specific area of the municipality/project or wants to make onw clusters/groups.

3. Approval of individual sensors if you wants them in your selection. Approval based upon data capture, so show also that part of the metadata table. Important if you don't have many sensors and want to focus on the sensors which measured long time. Add input field so the user can choose the minimum level of data capture. Be careful, low data capture doesn't have to be a bad sensor. Additional the plausibility or other can be added later for that.

4. visualisation, part of comparing the data with reference and each other, doing interpretation of patterns and measurements

[elma13]

Comments:
on 1. It is already al lot of information, it is fine to keep it as an overview, without options to filter.
on 3. focus on the filtering on maximum value and data capture. change the table to show the maximum value, too. Start with those options and the specific stations as second tab.

[elma13]

• add functionality to the user input minimum data capture, so dezelect all stations below that data capture. So this capture should be stored somewhere in the data_stations