patch 8.1.2144: side effects when using t_ti to enable modifyOtherKeys

Problem:    Side effects when using t_ti to enable modifyOtherKeys.
Solution:   Add t_TI and t_TE.
diff --git a/src/optiondefs.h b/src/optiondefs.h
index 3745d07..47f17ed 100644
--- a/src/optiondefs.h
+++ b/src/optiondefs.h
@@ -2969,7 +2969,9 @@
     p_term("t_ST", T_CST)
     p_term("t_Te", T_STE)
     p_term("t_te", T_TE)
+    p_term("t_TE", T_CTE)
     p_term("t_ti", T_TI)
+    p_term("t_TI", T_CTI)
     p_term("t_Ts", T_STS)
     p_term("t_ts", T_TS)
     p_term("t_u7", T_U7)