DataForm: Improve ListMutliTreeView

- Disable horizontal scrollbar so the treeview expands
- Ellipsize values after 40 chars
- Add row tooltip if entries were ellipsized
3 jobs for master in 8 minutes and 57 seconds (queued for 1 second)
Status Job ID Name Coverage
  Test
passed #20160
run-appdata

00:00:33

passed #20159
run-tests

00:07:55

 
  Build
passed #20161
run-build

00:00:27