revert limiting semantic highlight to one session

[rchl]

Revert semantic-highlighting specific part of #2688 since it breaks highlighting in Vue files.

[jwortmann]

If multiple sessions for semantic highlighting should really be allowed, then the show scope name command should probably check all self.sessions(self.capability) until it finds one that provides a semantic token for the given point, instead of using only one session in

LSP/plugin/semantic_highlighting.py

Line 61 in 9bfb68d

if session := self.best_session('semanticTokensProvider'):

[rchl]

I've changed it to show tokens from all servers:

[jwortmann]

I wonder why is there a link (a tag) for the session name, and without any link destination? I think it would be better to change this maybe using a dimmed color instead, like the syntax name which is displayed in the ST references popup.

[rchl]

Updated:

While at it consolidated duplicated code.

[jwortmann]

Still not super happy with this approach to render tokens from all sessions at the same time. But I guess if desired we can opt-out with disabled_capabilities, while it would not be possible to opt-in with multiple sessions and the current code. So let's revert then.