unsetting filters in the barcharts creates empty data

[stvno]

After setting a day and/or hour filter by dragging a box on the respective barchart:

and unselecting again by clicking outside the selection box on the barchart, the other barchart becomes empty:

and the map becomes grey:

The problem seems to be that the URL-parameter for the respective filter is set wrong: &df=7%2F7&hf=0%2F24 that is dayfilter 7-7 instead of 0-7 or removed altogether

[stvno]

Diving a bit more in the code it became apparent that DC is to blame: it produces an extent of 0 length: eg [7,7]

Possible fixes:

• create a clearHourFilter and a clearDayFilter in src/store/actions/date.js to be called when the extent is 0 long
• check for 0-length filters in src/store/actions/date.js and change those to 0-7 & 0-24 filters
• check for 0-length filters in the onExtentChange function in `src/components/Sidebar/TimeFilters/index.js' and change those 0-7 & 0-24