Grouping bugs.

[pavelav]

Hello @arnedesmedt ,
Seeing some issues, when grouping on multiple columns. The steps are illustrated as screenshots:

1. Initial state:
   
   2.1. Group by location - so far so good:
   
   2.2. Then group by resource - notice how resourceA appears under domain-1 group (incorrect):
   
   2.3. Things change if I try to sort. Sorting by location causes domain-1 group to vanish (incorrect):
   
   2.4. However if I sort by Resource instead, the table starts to look okay:
   
   3.1. For the sake of completeness also including screenshots when grouping by Resource first:
   
   3.2. And then by location (incorrect - no resourceB group):
   

You can find the Vue component I used to reproduce the issue in commit pavelav@75aaed8

Please take a look. Thank you!

[arnedesmedt]

Thx for the report, solved this issue in 2.4.2

[pavelav]

Great, thank you for a quick fix!