Fix the odd bug here and there

Fix the odd bug here and there

* eglot.el (eglot--connect): Activate editing mode where
applicable here.
(eglot, eglot-reconnect): Not here or here.
(eglot--process-sentinel): Catch auto-reconnect errors.
(eglot--notify): Dont send 'id=null', it messes up js's lsp
(eglot--reply): Do send id here.
(eglot--log-event): Simplify protocol. Complexify implementation.
(eglot--process-receive, eglot--process-send): Simplify
eglot--log-event call.
(eglot--request, eglot--notify, eglot--reply): Simplify
eglot--process-send call
(eglot--server-client/registerCapability): Fix bug when replying
with wrong id.
(eglot--xref-reset-known-symbols): Take DUMMY arg.