UI for tool panels to have 'fixed' sizes
Please add an option (as it may not be for everyone) to fix the size of the height of the tool panels, regardless of what tab is selected. It drives me mad that it jumps around so much, when selecting a different tab, and that resizes the entire column. Please can it just remain fixed, so all the tabs are where I left them, regardless of what's selected? The screenshots aren't even the worst that I've had, it's just two seconds of flicking through different tabs and seeing how they're all affected

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Kit commented
The additional thing to this, is that when you're adjusting the height of the panels, you get literally 1 pixel for the adjuster, else it just selects which ever panel you're over. Please can these adjusters not be so picky!! It's way too tiny
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Nikolas commented
I second this. I use a 16:18 display (rotated 90°), which is great for having plenty of tool panels. But the described problem—everything jumping around and constantly having to reset my workspace because I adjusted the height of some panels (as they spontaneously changed their size)—is infuriating.