patch 8.1.2039: character from 'showbreak' does not use 'wincolor'

Problem:    Character from 'showbreak' does not use 'wincolor'. (Nick Jensen)
Solution:   Mix with 'wincolor'. (closes #4938)
diff --git a/src/testdir/dumps/Test_popupwin_showbreak.dump b/src/testdir/dumps/Test_popupwin_showbreak.dump
index e7d03d0..8ce0a75 100644
--- a/src/testdir/dumps/Test_popupwin_showbreak.dump
+++ b/src/testdir/dumps/Test_popupwin_showbreak.dump
@@ -1,10 +1,10 @@
 >1+0&#ffffff0| @73
 |2| @73
-|3| @73
-|4| @25|╔+0#0000001#ffd7ff255|═@17|╗| +0#0000000#ffffff0@27
-|5| @25|║+0#0000001#ffd7ff255| |a| |l|o|n|g| |l|i|n|e| |h|e|r|e| |║| +0#0000000#ffffff0@27
-|6| @25|╚+0#0000001#ffd7ff255|═@17|╝| +0#0000000#ffffff0@27
-|7| @73
+|3| @27|╔+0#0000001#ffd7ff255|═@13|╗| +0#0000000#ffffff0@29
+|4| @27|║+0#0000001#ffd7ff255| |a| |l|o|n|g| |l|i|n|e| @1|║| +0#0000000#ffffff0@29
+|5| @27|║+0#0000001#ffd7ff255| |>+0#4040ff13&@1| |h+0#0000001&|e|r|e| |t|h|a|t| |║| +0#0000000#ffffff0@29
+|6| @27|║+0#0000001#ffd7ff255| |>+0#4040ff13&@1| | +0#0000001&|w|r|a|p|s| @3|║| +0#0000000#ffffff0@29
+|7| @27|╚+0#0000001#ffd7ff255|═@13|╝| +0#0000000#ffffff0@29
 |8| @73
 |9| @73
 @57|1|,|1| @10|T|o|p|