[Tab switcher] Fix binding loop that spams the log
I was a bit surprised to see this. The binding loop message is super spammy when the Breeze tab switcher is in use. Is nobody who runs plasma from git master using the tab switcher at all, or using a non-default one? I suppose I would fall into the latter category as I use the Large Icons one.
BUG: 410984 FIXED-IN: 5.21