Add ability to highlight messages based on user badges (#1704)

Co-authored-by: Paweł <zneix@zneix.eu>
Co-authored-by: 23rd <23rd@vivaldi.net>
Co-authored-by: pajlada <rasmus.karlsson@pajlada.com>

src/widgets/dialogs/BadgePickerDialog.hpp

@@ -0,0 +1,29 @@
+#pragma once
+
+#include "util/DisplayBadge.hpp"
+
+#include <QDialog>
+
+namespace chatterino {
+
+class BadgePickerDialog : public QDialog,
+                          public std::enable_shared_from_this<BadgePickerDialog>
+{
+    using QIconPtr = std::shared_ptr<QIcon>;
+    using BadgeOpt = boost::optional<DisplayBadge>;
+
+public:
+    BadgePickerDialog(QList<DisplayBadge> badges, QWidget *parent = nullptr);
+
+    BadgeOpt getSelection() const
+    {
+        return this->currentBadge_;
+    }
+
+private:
+    QComboBox *dropdown_;
+
+    BadgeOpt currentBadge_;
+};
+
+}  // namespace chatterino