added AboutPage back in again

src/widgets/settingspages/aboutpage.hpp

@@ -2,6 +2,8 @@
 
 #include "widgets/settingspages/settingspage.hpp"
 
+class QLabel;
+
 namespace chatterino {
 namespace widgets {
 namespace settingspages {
@@ -10,6 +12,9 @@ class AboutPage : public SettingsPage
 {
 public:
     AboutPage();
+
+private:
+    QLabel *logo;
 };
 }  // namespace settingspages
 }  // namespace widgets