I can't find my taskbar properties!
Oh. And Tomahhhto!
And again - and not unexpected - wrong. It is called so in Windows and there this correct. In Linux (= kernel) this can never be true, as the kernel does not know anything about any bar. In Cinnamon it was never called other than panel. And if an applet gets added to it, than it this panel, which performs the action, not the panel. If you open an application in Mint to do some maths, than it is this application, which does that and not Mint.