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/singletons/Settings.hpp

@@ -3,12 +3,8 @@
 #include "BaseSettings.hpp"
 #include "common/Channel.hpp"
 #include "common/SignalVector.hpp"
-#include "controllers/filters/FilterRecord.hpp"
-#include "controllers/highlights/HighlightBadge.hpp"
-#include "controllers/highlights/HighlightPhrase.hpp"
-#include "controllers/moderationactions/ModerationAction.hpp"
-#include "controllers/nicknames/Nickname.hpp"
 #include "singletons/Toasts.hpp"
+#include "util/RapidJsonSerializeQString.hpp"
 #include "util/StreamerMode.hpp"
 #include "widgets/Notebook.hpp"
 #include "widgets/splits/SplitInput.hpp"
@@ -24,7 +20,10 @@ class HighlightPhrase;
 class HighlightBlacklistUser;
 class IgnorePhrase;
 class FilterRecord;
+using FilterRecordPtr = std::shared_ptr<FilterRecord>;
 class Nickname;
+class HighlightBadge;
+class ModerationAction;
 
 /// Settings which are available for reading on all threads.
 class ConcurrentSettings
@@ -521,7 +520,3 @@ private:
 };
 
 }  // namespace chatterino
-
-#ifdef CHATTERINO
-#    include "singletons/Settings.hpp"
-#endif