Fix the background color of the scrollbar inside the preview window

CHANGELOG.md

@@ -3,7 +3,7 @@ CHANGELOG
 
 0.41.0
 ------
-- Bug fixes
+- Bug fixes and improvements
 
 0.40.0
 ------

src/terminal.go

@@ -1954,7 +1954,7 @@ func (t *Terminal) renderPreviewScrollbar(yoff int, barLength int, barStart int)
 		t.previewer.bar[i] = bar
 		t.pborder.Move(y, x)
 		if i >= yoff+barStart && i < yoff+barStart+barLength {
-			t.pborder.CPrint(tui.ColScrollbar, t.scrollbar)
+			t.pborder.CPrint(tui.ColPreviewScrollbar, t.scrollbar)
 		} else {
 			t.pborder.Print(" ")
 		}

src/tui/tui.go

@@ -503,6 +503,7 @@ var (
 	ColPreviewBorder        ColorPair
 	ColBorderLabel          ColorPair
 	ColPreviewLabel         ColorPair
+	ColPreviewScrollbar     ColorPair
 )
 
 func EmptyTheme() *ColorTheme {
@@ -721,4 +722,5 @@ func initPalette(theme *ColorTheme) {
 	ColPreviewLabel = pair(theme.PreviewLabel, theme.PreviewBg)
 	ColPreview = pair(theme.PreviewFg, theme.PreviewBg)
 	ColPreviewBorder = pair(theme.Border, theme.PreviewBg)
+	ColPreviewScrollbar = pair(theme.Scrollbar, theme.PreviewBg)
 }