applet: remove showSpeed type restrictions
these supposedly had been added a decade ago because VPNs may have not been working correctly. I just tried with wireguard and at least there it is working.
let's try removing the restrictions
should bugs turn up we can always put a "not supported on this type" warning in place instead. hiding the tab conditionally is a bit weird because the users then doesn't know why some devices have the speed tab and others do not. also we should document why the exclusion of some types is necessary :|