refactored the settings dialog

src/widgets/settingspages/highlightingpage.cpp

@@ -0,0 +1,12 @@
+#include "highlightingpage.hpp"
+
+namespace chatterino {
+namespace widgets {
+namespace settingspages {
+HighlightingPage::HighlightingPage()
+    : SettingsPage("Highlights", ":/images/VSO_Link_blue_16x.png")
+{
+}
+}  // namespace settingspages
+}  // namespace widgets
+}  // namespace chatterino