ime: Reset terminal's IME state on text_input.leave

To reproduce issue:
- Launch an IME from inside foot
- Type in some preedit text
- Use Ctrl-C to close the IME
- IME text stays in terminal until focus is changed

CHANGELOG.md

@@ -61,6 +61,8 @@
   before sending the new dimensions to the client application. The
   timing can be tweaked, or completely disabled, by setting
   `resize-delay-ms` (https://codeberg.org/dnkl/foot/issues/301).
+* The IME state no longer stays stuck in the terminal if the IME goes
+  away during preedit.
 
 
 ### Deprecated
@@ -75,6 +77,7 @@
 ### Contributors
 
 * [craigbarnes](https://codeberg.org/craigbarnes)
+* [tdeo](https://codeberg.org/tdeo)
 
 
 ## 1.6.3

ime.c

@@ -39,6 +39,11 @@ leave(void *data, struct zwp_text_input_v3 *zwp_text_input_v3,
 {
     struct seat *seat = data;
     LOG_DBG("leave: seat=%s", seat->name);
+
+    struct terminal *term = seat->kbd_focus;
+    if (term != NULL)
+        term_ime_reset(term);
+
     ime_disable(seat);
 }