lv_ta: lv_ta_cursor_show() don't let cursor visible if disabled

lv_objx/lv_ta.c

@@ -522,6 +522,8 @@ void lv_ta_set_cursor_show(lv_obj_t * ta, bool show)
 {
     lv_ta_ext_t * ext = lv_obj_get_ext(ta);
     ext->cursor_show = show == false ? 0 : 1;
+    ext->cursor_state = 0;
+    lv_obj_inv(ta);
 }
 
 /**