Note that this commit will also disable daily grouping for datasets with more than 30 data points. This will also smartly do the grouping by month when grouping a full year.
1. It defaults to `cache: true` already
2. Setting it to `false` for non-GET request doesn't do anything
3. We were correcting `cache: false` GET requests to use `cache: true`
…so setting it to anything at all, for any type of request doesn't make sense (anymore)
Note that this is only applied on date-input and not the old date-picker for now.
This commit is also slightly modifying admin report dates form to ensure the native picker is correctly used, as a result: it doesn’t auto refresh on date change and fixes a border bug.
