Add ability to (select AND) UN-select ALL columns in query editor

Hi guys!

I really LOVE the new power coming with version 0.33.0 - great work !!! Thank you !!!

One thing tough that seems to be a quick fix is enabling a user to not only “SELECT ALL columns” in the new query editor, but also to “DEselect ALL columns”. Often times we’re working with really large tables and only need a hand full of columns. Hence it’s much quicker to pick what you need rather than unpick what you don’t need.

The lack of this functionality becomes even more depressing since whenever you unselect (or select) a checkbox of a column, the browser (Chrome in my case) jumps all the way back up to the top of the page making it extremely tedious to select the desired set of columns.

Thank you !
Cheers
Fabian

Hi @SetSails
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