a workaround that is probably to do "on mousewheel lock the camera position and a little time after the mouse wheel stops unlock it".
I tried this and apart from zoom happening it also seem to eat keyboard input sometimes when mouse is over build bar.
@wondible On a side note, I noticed that in sandox window there is a horisontal spacing between unit icons. I set font-size to 0px and it dissapeared... How did spaces get between icons? Is this a default behavior of <a>? How am I supposed to search for it?
Web search term to learn more, or figure out what styles are applied (Coherent Debugger) ? Sandbox items are divs styled with inline-block, so they behave like words. Words with spaces between them apparently, where the size depends on the fonts.