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/controllers/ignores/IgnorePhrase.cpp

@@ -3,6 +3,7 @@
 #include "Application.hpp"
 #include "controllers/accounts/AccountController.hpp"
 #include "providers/twitch/TwitchAccount.hpp"
+#include "singletons/Settings.hpp"
 
 namespace chatterino {
 
@@ -112,4 +113,10 @@ bool IgnorePhrase::containsEmote() const
     return !this->emotes_.empty();
 }
 
+IgnorePhrase IgnorePhrase::createEmpty()
+{
+    return IgnorePhrase(QString(), false, false,
+                        getSettings()->ignoredPhraseReplace.getValue(), true);
+}
+
 }  // namespace chatterino