Improvements to emacs inlay hints
Improvements to emacs inlay hints

 - only send request if workspace is initialized (emacs-lsp doesn't seem to
   prevent sending requests before the initialized notification is sent)
 - check whether we're still in the correct buffer before sending request

rust-analyzer/rust-analyzer,rust-analyzer/rust-analyzer,rust-analyzer/rust-analyzer,rust-analyzer/rust-analyzer,rust-analyzer/rust-analyzer