Scroll query tabs by tab width instead of fixed width
When I have lots of query tabs open (10+) arrow buttons << and >> appear for horizontal scroll. But when the button is clicked, tabs move by fixed width (50 pixels or something like that). That means I should click up to 3 times to scroll only one tab. 10 tabs = 20-30 clicks (very annoying) If you'll make moving to next tab on each arrow button click it would improve usability a lot.
Also, I would expect scroll wheel working for the same purpose when I hover the mouse pointer over query tabs.