patch 8.1.1778: not showing the popup window right border is confusing

Problem:    Not showing the popup window right border is confusing.
Solution:   Also show the border when there is no close button. (closes #4747)
diff --git a/src/testdir/dumps/Test_popupwin_20.dump b/src/testdir/dumps/Test_popupwin_20.dump
index 14487ff..39ae737 100644
--- a/src/testdir/dumps/Test_popupwin_20.dump
+++ b/src/testdir/dumps/Test_popupwin_20.dump
@@ -5,8 +5,8 @@
 |5| @40||+0#0000001#ffd7ff255| @11||| +0#0000000#ffffff0@18
 |6| |++0#0000001#ffd7ff255|-@8| +0#0000000#ffffff0@9| +0#0000001#ffd7ff255@14| +0#0000000#ffffff0@4|++0#0000001#ffd7ff255|-@11|+| +0#0000000#ffffff0@18
 |7| ||+0#0000001#ffd7ff255|b|o|r|d|e|r| |T|L| +0#0000000#ffffff0@9| +0#0000001#ffd7ff255@3|p|a|d@1|i|n|g|s| @2| +0#0000000#ffffff0@37
-|8| @20| +0#0000001#ffd7ff255@14| +0#0000000#ffffff0@16||+0#0000001#ffd7ff255| @2|w|r|a|p@1|e|d| |l|o|n|g|e|r| |t|e
-|9+0#0000000#ffffff0| @20| +0#0000001#ffd7ff255@14| +0#0000000#ffffff0@16||+0#0000001#ffd7ff255| @2|x|t| @14
+|8| @20| +0#0000001#ffd7ff255@14| +0#0000000#ffffff0@12||+0#0000001#ffd7ff255| @2|w|r|a|p@1|e|d| |l|o|n|g|e|r| |t|e| @2||
+|9+0#0000000#ffffff0| @20| +0#0000001#ffd7ff255@14| +0#0000000#ffffff0@12||+0#0000001#ffd7ff255| @2|x|t| @17||
 |1+0#0000000#ffffff0|0| @72
 |1@1| @50||+0#0000001#ffd7ff255| @2|r|i|g|h|t| |a|l|i|g|n|e|d| |t|e|x|t
 |1+0#0000000#ffffff0|2| @72
diff --git a/src/testdir/dumps/Test_popupwin_21.dump b/src/testdir/dumps/Test_popupwin_21.dump
index 4a32eaa..56d8d14 100644
--- a/src/testdir/dumps/Test_popupwin_21.dump
+++ b/src/testdir/dumps/Test_popupwin_21.dump
@@ -5,8 +5,8 @@
 |5| @40|║+0#0000001#ffd7ff255| @11|║| +0#0000000#ffffff0@18
 |6| |╔+0#0000001#ffd7ff255|═@8| +0#0000000#ffffff0@9| +0#0000001#ffd7ff255@14| +0#0000000#ffffff0@4|╚+0#0000001#ffd7ff255|═@11|╝| +0#0000000#ffffff0@18
 |7| |║+0#0000001#ffd7ff255|b|o|r|d|e|r| |T|L| +0#0000000#ffffff0@9| +0#0000001#ffd7ff255@3|p|a|d@1|i|n|g|s| @2| +0#0000000#ffffff0@37
-|8| @20| +0#0000001#ffd7ff255@14| +0#0000000#ffffff0@16|║+0#0000001#ffd7ff255| @2|w|r|a|p@1|e|d| |l|o|n|g|e|r| |t|e
-|9+0#0000000#ffffff0| @20| +0#0000001#ffd7ff255@14| +0#0000000#ffffff0@16|║+0#0000001#ffd7ff255| @2|x|t| @14
+|8| @20| +0#0000001#ffd7ff255@14| +0#0000000#ffffff0@12|║+0#0000001#ffd7ff255| @2|w|r|a|p@1|e|d| |l|o|n|g|e|r| |t|e| @2|║
+|9+0#0000000#ffffff0| @20| +0#0000001#ffd7ff255@14| +0#0000000#ffffff0@12|║+0#0000001#ffd7ff255| @2|x|t| @17|║
 |1+0#0000000#ffffff0|0| @72
 |1@1| @50|║+0#0000001#ffd7ff255| @2|r|i|g|h|t| |a|l|i|g|n|e|d| |t|e|x|t
 |1+0#0000000#ffffff0|2| @72