Filter language server completions even when is_incomplete: true (#32491)

In #31872 I changed the behavior of completions to not filter instead of
requerying completions when `is_incomplete: false`. Unfortunately this
also stopped filtering completions when `is_incomplete: true` - we still
want to filter the incomplete completions so that the menu updates
quickly even when completions are slow. This does mean that the
completions menu will display partial results, hopefully only briefly
while waiting for fresh completions.

Thanks to @mikayla-maki for noticing the regression. Thankfully just in
time to fix it before this makes it into a stable release. Leaving off
release notes since I will cherry-pick this to the current preview
version, 190.x, and there probably won't be a preview release before the
next stable.

Release Notes:

- N/A

crates/editor/src/editor.rs

@@ -5139,10 +5139,13 @@ impl Editor {
             .as_ref()
             .map_or(true, |provider| provider.filter_completions());
 
-        // When `is_incomplete` is false, can filter completions instead of re-querying when the
-        // current query is a suffix of the initial query.
         if let Some(CodeContextMenu::Completions(menu)) = self.context_menu.borrow_mut().as_mut() {
-            if !menu.is_incomplete && filter_completions {
+            if filter_completions {
+                menu.filter(query.clone(), provider.clone(), window, cx);
+            }
+            // When `is_incomplete` is false, no need to re-query completions when the current query
+            // is a suffix of the initial query.
+            if !menu.is_incomplete {
                 // If the new query is a suffix of the old query (typing more characters) and
                 // the previous result was complete, the existing completions can be filtered.
                 //
@@ -5160,7 +5163,6 @@ impl Editor {
                         menu.initial_position.to_offset(&snapshot) == position.to_offset(&snapshot)
                     };
                     if position_matches {
-                        menu.filter(query.clone(), provider.clone(), window, cx);
                         return;
                     }
                 }