patch 8.1.1496: popup window height is not recomputed
Problem: Popup window height is not recomputed.
Solution: Recompute the height when needed.
diff --git a/src/testdir/dumps/Test_popupwin_06.dump b/src/testdir/dumps/Test_popupwin_06.dump
index 3dfcbc2..59a9d0e 100644
--- a/src/testdir/dumps/Test_popupwin_06.dump
+++ b/src/testdir/dumps/Test_popupwin_06.dump
@@ -4,7 +4,7 @@
|~| @6|o+0#0000001#ffd7ff255|t|h|e|r| |t|a|b| @15| +0#4040ff13#ffffff0@41
|~| @6|a+0#0000001#ffd7ff255| |c+0#ff404010&|o|m@1|e|n|t| +0#0000001&|l|i|n|e| @10| +0#4040ff13#ffffff0@41
|~| @6|t+0#0000001#ffd7ff255|h|i|s| |l|i|n|e| |w|i|l@1| |n|o|t| |f|i|t| |h|e| +0#4040ff13#ffffff0@41
-|~| @73
+|~| @6|r+0#0000001#ffd7ff255|e| @22| +0#4040ff13#ffffff0@41
|~| @73
|~| @73
|:+0#0000000&|r|e|d|r|a|w| @49|0|,|0|-|1| @8|A|l@1|