patch 8.1.1936: not enough tests for text property popup window

Problem:    Not enough tests for text property popup window.
Solution:   Add a few more tests.  Make negative offset work.  Close all
            popups when window closes.
diff --git a/src/version.c b/src/version.c
index f798b8f..2151002 100644
--- a/src/version.c
+++ b/src/version.c
@@ -762,6 +762,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1936,
+/**/
     1935,
 /**/
     1934,