w32_common: release all input when entering context menu

Author: kasper93

video/out/w32_common.c

@@ -1636,6 +1636,9 @@ static LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam,
             return 0;
         }
         break;
+    case WM_ENTERMENULOOP:
+        mp_input_put_key(w32->input_ctx, MP_INPUT_RELEASE_ALL);
+        break;
     case WM_KILLFOCUS:
         mp_input_put_key(w32->input_ctx, MP_INPUT_RELEASE_ALL);
         w32->focused = false;