Dataframe view: sorting and primary column selection

[abey79]

In time range mode, there are two "header" columns: time and entity path. It should be possible to:

• select which one is the "primary" one (eg. appears first and is used for grouping)
• choose the sort direction independently for both of them...
• ...using an icon in the column header.

Currently, it's possible to choose the primary column, but sort order is not indepenent.

Here, time is primary, and both are sorted in ascending direction:

When fixing the UI for this issue, it would be a good time to also address:

• Dataframe view query UI: display timeline/latest at time when in "follow" mode #7130

[abey79]

This is only really needed if/when we do:

• Add support for having entity path as rows #7379

[gavrelina]

will leave a proposal here to not forget it!

Screen.Recording.2024-09-11.at.11.47.29.mp4