Handle multiple languages servers in spinner

For a long time there was a TODO for handling more
than just the first connected language server on a
given buffer. Now we pick the first busy server to
display the spinner for, so we can indicate if any
attached server is busy.

helix-term/src/ui/statusline.rs

@@ -172,15 +172,18 @@ fn render_mode<'a>(context: &RenderContext) -> Spans<'a> {
     }
 }
 
-// TODO think about handling multiple language servers
 fn render_lsp_spinner<'a>(context: &RenderContext) -> Spans<'a> {
     let frame = context
         .doc
         .language_servers()
-        .next()
-        .and_then(|srv| context.spinners.get(srv.id()))
-        .and_then(|spinner| spinner.frame());
-    if let Some(frame) = frame {
+        .map(|srv| {
+            context
+                .spinners
+                .get(srv.id())
+                .and_then(|spinner| spinner.frame())
+        })
+        .find(|frame| frame.is_some());
+    if let Some(Some(frame)) = frame {
         Span::raw(format!(" {} ", frame)).into()
     } else {
         Spans::default()