patch 8.1.1405: "highlight" option of popup windows not supported
Problem: "highlight" option of popup windows not supported.
Solution: Implement the "highlight" option.
diff --git a/src/testdir/dumps/Test_popupwin_01.dump b/src/testdir/dumps/Test_popupwin_01.dump
index b3818c1..2a444ca 100644
--- a/src/testdir/dumps/Test_popupwin_01.dump
+++ b/src/testdir/dumps/Test_popupwin_01.dump
@@ -1,8 +1,8 @@
>1+0&#ffffff0| @73
|2| @73
-|3| @8|h+0fd7ff255|e|l@1|o| |t|h|e|r|e| @8|r+0#0000001#ffd7ff255| |o|n|e| @8| +0#0000000#ffffff0@30
-|4| @22|a+0#0000001#ffd7ff255|n|o|t|h|e|r| |t|w|o| @8| +0#0000000#ffffff0@30
-|5| @22|a+0#0000001#ffd7ff255|n|o|t|h|e|r| |t|h|r|e@1| @6| +0#0000000#ffffff0@30
+|3| @8|h+0fd7ff255|e|l@1|o| |t|h|e|r|e| @8|r+0&#afffff255| |o|n|e| @8| +0&#ffffff0@30
+|4| @22|a+0&#afffff255|n|o|t|h|e|r| |t|w|o| @8| +0&#ffffff0@30
+|5| @22|a+0&#afffff255|n|o|t|h|e|r| |t|h|r|e@1| @6| +0&#ffffff0@30
|6| @73
|7| @73
|8| @73