imm32: Use default IME window WM_DESTROY to call imm_couninit_thread.

dlls/imm32/imm.c

@@ -1028,7 +1028,6 @@ static HWND imm_detach_default_window(IMMThreadData *thread_data)
     to_destroy = thread_data->hwndDefault;
     thread_data->hwndDefault = NULL;
     thread_data->windowRefs = 0;
-    imm_couninit_thread(TRUE);
     return to_destroy;
 }
 
@@ -3470,6 +3469,14 @@ LRESULT WINAPI __wine_ime_wnd_proc(HWND hwnd, UINT msg, WPARAM wparam, LPARAM lp
         init_messages();
         return TRUE;
 
+    case WM_DESTROY:
+        {
+            HWND default_hwnd = ImmGetDefaultIMEWnd(0);
+            if (!default_hwnd || hwnd == default_hwnd)
+                imm_couninit_thread(TRUE);
+        }
+        return TRUE;
+
     case WM_IME_INTERNAL:
         return ime_internal_msg(wparam, lparam);
     }

dlls/user32/tests/win.c

@@ -3760,7 +3760,6 @@ static void test_SetActiveWindow_0_proc( char **argv )
     else /* < Win10 */
     {
         ok( tmp == hwnd, "SetActiveWindow returned %p\n", tmp );
-        todo_wine
         ok( GetLastError() == 0, "got error %lu\n", GetLastError() );
 
         tmp = GetForegroundWindow();