Remove Unnecessary Includes in Headers (#4275)

* refactor: remove unnecessary includes in headers

* fix: formatting

* chore: changelog

* fix: scrollbar

* fix: suggestions and old appbase remains

* fix: suggestion

* fix: missing Qt forward declarations

* fix: another qt include

* fix: includes for precompiled-headers=off

* Add missing `<memory>` includes

* Add missing `#pragma once`

* Fix tests

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

src/messages/SharedMessageBuilder.hpp

@@ -1,8 +1,8 @@
+#pragma once
+
 #include "common/Aliases.hpp"
 #include "common/Outcome.hpp"
 #include "messages/MessageBuilder.hpp"
-#include "messages/MessageColor.hpp"
-#include "providers/twitch/TwitchBadge.hpp"
 
 #include <IrcMessage>
 #include <QColor>
@@ -10,6 +10,9 @@
 
 namespace chatterino {
 
+class Badge;
+class Channel;
+
 class SharedMessageBuilder : public MessageBuilder
 {
 public: