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/gpui/src/platform/linux/x11/window.rs

@@ -873,8 +873,8 @@ impl X11WindowStatePtr {
         let mut bounds: Option<Bounds<Pixels>> = None;
         if let Some(mut input_handler) = state.input_handler.take() {
             drop(state);
-            if let Some(range) = input_handler.selected_text_range() {
-                bounds = input_handler.bounds_for_range(range);
+            if let Some(selection) = input_handler.selected_text_range(true) {
+                bounds = input_handler.bounds_for_range(selection.range);
             }
             let mut state = self.state.borrow_mut();
             state.input_handler = Some(input_handler);
@@ -1396,6 +1396,13 @@ impl PlatformWindow for X11Window {
         }
     }
 
+    fn update_ime_position(&self, bounds: Bounds<Pixels>) {
+        let mut state = self.0.state.borrow_mut();
+        let client = state.client.clone();
+        drop(state);
+        client.update_ime_position(bounds);
+    }
+
     fn gpu_specs(&self) -> Option<GPUSpecs> {
         self.0.state.borrow().renderer.gpu_specs().into()
     }