In this PR
- fixing Collapse on view groups views: aggregate bar should be included
in the collapse (@magrinj )
- respect the html table pattern: the aggregate bar is now a <tr>
element included in a <table> (before that, it was a <tr> not included
in anything)
- add a top-border on the aggregate bar
- introduce short labels for the on-cell value display (display "Empty"
instead of "Count empty" to lighten the interface)
- remove the feature flag !
17850b76ab