patch 8.1.2194: modifyOtherKeys is not enabled by default

Problem:    ModifyOtherKeys is not enabled by default.
Solution:   Add t_TI and t_TE to the builtin xterm termcap.
diff --git a/src/term.c b/src/term.c
index fa4375e..afdd482 100644
--- a/src/term.c
+++ b/src/term.c
@@ -912,6 +912,8 @@
     {(int)KS_TE,	IF_EB("\033[2J\033[?47l\0338",
 				  ESC_STR "[2J" ESC_STR_nc "[?47l" ESC_STR_nc "8")},
 #  endif
+    {(int)KS_CTI,	IF_EB("\033[>4;2m", ESC_STR_nc "[>4;2m")},
+    {(int)KS_CTE,	IF_EB("\033[>4;m", ESC_STR_nc "[>4;m")},
     {(int)KS_CIS,	IF_EB("\033]1;", ESC_STR "]1;")},
     {(int)KS_CIE,	"\007"},
     {(int)KS_TS,	IF_EB("\033]2;", ESC_STR "]2;")},