I have a minor feature request.
I would like to have Mouse Wheel Button (Mouse3) close the query results tabs.
Right now, you have to click (Mouse1) the little 'x' button.
If you have been making many tabs to close, as you begin to close them, the tab width changes, changing the location of the 'x'. This means that you have to move the pointer between each close. See attached gif (also posted to imgur at https://imgur.com/a/Nhgsw).
Closing many tabs with Mouse3 is much easier as you can be anywhere on the tab, not just over the 'x'.
This behaviour (and the choice of Mouse3) is consistent with how tabs are closed in all major web browsers and many text editors (Notepad++, VSCode, Atom, Sublime, etc.)