What inspired this wish list request?
Working with data tables with hundreds or thousands of columns.
What is the improvement you would like to see?
Browsing columns pane is fast and it can be filtered down quickly and you cannot do that with column headers (or with the table). I would like to be able to perform more actions we can perform from columns header from columns pane. Especially copying/pasting/inserting but I wouldn't mind if I had all the possible options under some new drop-down menu.
One possible mock-up of the idea (there are some options which shouldn't be included and some are duplicated)
Why is this idea important?
Makes it easier to work with very wide tables.