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/widgets/dialogs/EmotePopup.hpp

@@ -1,8 +1,6 @@
 #pragma once
 
-#include "providers/twitch/TwitchChannel.hpp"
 #include "widgets/BasePopup.hpp"
-#include "widgets/Notebook.hpp"
 
 #include <pajlada/signals/signal.hpp>
 #include <QLineEdit>
@@ -13,6 +11,8 @@ struct Link;
 class ChannelView;
 class Channel;
 using ChannelPtr = std::shared_ptr<Channel>;
+class Notebook;
+class TwitchChannel;
 
 class EmotePopup : public BasePopup
 {