patch 8.1.1935: test for text property popup window is flaky

Problem:    Test for text property popup window is flaky.
Solution:   Remove the undo message
diff --git a/src/version.c b/src/version.c
index 966c5b7..f798b8f 100644
--- a/src/version.c
+++ b/src/version.c
@@ -762,6 +762,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1935,
+/**/
     1934,
 /**/
     1933,