LibWeb: Move editing stuff into EditEventHandler.

Author: https://github.com/asynts
Commit: bbcc5a9332
Pull-request: https://github.com/SerenityOS/serenity/pull/4318
Reviewed-by: https://github.com/Lubrsi
Reviewed-by: https://github.com/awesomekling
Reviewed-by: https://github.com/linusg

Libraries/LibWeb/Forward.h

@@ -167,6 +167,7 @@ class ReplacedBox;
 
 namespace Web {
 class EventHandler;
+class EditEventHandler;
 class Frame;
 class FrameLoader;
 class InProcessWebView;