patch 8.1.1430: popup window option "wrap" not supported

Problem:    Popup window option "wrap" not supported.
Solution:   Implement it.
diff --git a/src/testdir/dumps/Test_popupwin_nowrap.dump b/src/testdir/dumps/Test_popupwin_nowrap.dump
new file mode 100644
index 0000000..6088d3b
--- /dev/null
+++ b/src/testdir/dumps/Test_popupwin_nowrap.dump
@@ -0,0 +1,10 @@
+>1+0&#ffffff0| @73
+|2| @73
+|3| @17|a+0#0000001#ffd7ff255| |l|o|n|g| |l|i|n| +0#0000000#ffffff0@45
+|4| @73
+|5| @73
+|6| @73
+|7| @73
+|8| @73
+|9| @73
+@57|1|,|1| @10|T|o|p| 
diff --git a/src/testdir/dumps/Test_popupwin_wrap.dump b/src/testdir/dumps/Test_popupwin_wrap.dump
new file mode 100644
index 0000000..3f7b000
--- /dev/null
+++ b/src/testdir/dumps/Test_popupwin_wrap.dump
@@ -0,0 +1,10 @@
+>1+0&#ffffff0| @73
+|2| @73
+|3| @17|a+0#0000001#ffd7ff255| |l|o|n|g| |l|i|n| +0#0000000#ffffff0@45
+|4| @17|e+0#0000001#ffd7ff255| |t|h|a|t| |w|o|n| +0#0000000#ffffff0@45
+|5| @17|t+0#0000001#ffd7ff255| |f|i|t| @4| +0#0000000#ffffff0@45
+|6| @73
+|7| @73
+|8| @73
+|9| @73
+@57|1|,|1| @10|T|o|p|