applets/taskmanager: always allow using tooltips for grouped tasks
requested to merge ngraham/plasma-desktop:always-allow-using-tooltips-to-switch-between-windows into master
Right now you can only use tooltips to switch between grouped tasks if they are enabled for hover too. This seems like an arbitrary limitation, and also results in an awkward UI in which you can disable tooltips for hover and enable them for switching between grouped tasks, but when you do so, you see a message that says "sorry, this is an invalid combination of settings!"
Well, let's make it not be an invalid combination of settings! This commit does just that, allowing a new combination of settings that users have requested while removing an awkward UI and reducing code complexity.
BUG: 450798 FIXED-IN: 5.27