Fix 'First Message' scrollbar highlights not being disabled (#3325)

Co-authored-by: Rasmus Karlsson <rasmus.karlsson@pajlada.com>

src/widgets/helper/ScrollbarHighlight.cpp

@@ -13,10 +13,12 @@ ScrollbarHighlight::ScrollbarHighlight()
 }
 
 ScrollbarHighlight::ScrollbarHighlight(const std::shared_ptr<QColor> color,
-                                       Style style, bool isRedeemedHighlight)
+                                       Style style, bool isRedeemedHighlight,
+                                       bool isFirstMessageHighlight)
     : color_(color)
     , style_(style)
     , isRedeemedHighlight_(isRedeemedHighlight)
+    , isFirstMessageHighlight_(isFirstMessageHighlight)
 {
 }
 
@@ -35,6 +37,11 @@ bool ScrollbarHighlight::isRedeemedHighlight() const
     return this->isRedeemedHighlight_;
 }
 
+bool ScrollbarHighlight::isFirstMessageHighlight() const
+{
+    return this->isFirstMessageHighlight_;
+}
+
 bool ScrollbarHighlight::isNull() const
 {
     return this->style_ == None;

src/widgets/helper/ScrollbarHighlight.hpp

@@ -21,17 +21,20 @@ public:
     ScrollbarHighlight();
 
     ScrollbarHighlight(const std::shared_ptr<QColor> color,
-                       Style style = Default, bool isRedeemedHighlight = false);
+                       Style style = Default, bool isRedeemedHighlight = false,
+                       bool isFirstMessageHighlight = false);
 
     QColor getColor() const;
     Style getStyle() const;
     bool isRedeemedHighlight() const;
+    bool isFirstMessageHighlight() const;
     bool isNull() const;
 
 private:
     std::shared_ptr<QColor> color_;
     Style style_;
     bool isRedeemedHighlight_;
+    bool isFirstMessageHighlight_;
 };
 
 }  // namespace chatterino