linux: Fix IME panel position while enumerating input methods (#12495)

Release Notes:

- N/A

This updates the IME position every time the selection changes, this is
probably only useful when you enumerate languages with your IME.

TODO:
- ~There is a rare chance that the ime panel is not updated because the
window input handler is None.~
- ~Update IME panel in vim mode.~
- ~Update IME panel when leaving Buffer search input.~

---------

Co-authored-by: Mikayla Maki <mikayla@zed.dev>

crates/search/src/buffer_search.rs

@@ -552,7 +552,7 @@ impl BufferSearchBar {
             active_editor.search_bar_visibility_changed(false, cx);
             active_editor.toggle_filtered_search_ranges(false, cx);
             let handle = active_editor.focus_handle(cx);
-            cx.focus(&handle);
+            self.focus(&handle, cx);
         }
         cx.emit(Event::UpdateLocation);
         cx.emit(ToolbarItemEvent::ChangeLocation(
@@ -1030,7 +1030,7 @@ impl BufferSearchBar {
         } else {
             return;
         };
-        cx.focus(&focus_handle);
+        self.focus(&focus_handle, cx);
         cx.stop_propagation();
     }
 
@@ -1043,7 +1043,7 @@ impl BufferSearchBar {
         } else {
             return;
         };
-        cx.focus(&focus_handle);
+        self.focus(&focus_handle, cx);
         cx.stop_propagation();
     }
 
@@ -1081,6 +1081,12 @@ impl BufferSearchBar {
         }
     }
 
+    fn focus(&self, handle: &gpui::FocusHandle, cx: &mut ViewContext<Self>) {
+        cx.on_next_frame(|_, cx| {
+            cx.invalidate_character_coordinates();
+        });
+        cx.focus(handle);
+    }
     fn toggle_replace(&mut self, _: &ToggleReplace, cx: &mut ViewContext<Self>) {
         if let Some(_) = &self.active_searchable_item {
             self.replace_enabled = !self.replace_enabled;
@@ -1089,7 +1095,7 @@ impl BufferSearchBar {
             } else {
                 self.query_editor.focus_handle(cx)
             };
-            cx.focus(&handle);
+            self.focus(&handle, cx);
             cx.notify();
         }
     }