Move the editor handling back to Vst2Bridge

Since we can have multiple editors in Vst3Bridge.

src/wine-host/bridges/vst3.h

@@ -22,6 +22,7 @@
 
 #include "../../common/communication/vst3.h"
 #include "../../common/configuration.h"
+#include "../editor.h"
 #include "common.h"
 
 /**
@@ -103,6 +104,9 @@ class Vst3Bridge : public HostBridge {
      */
     void run() override;
 
+    void handle_x11_events() override;
+    void handle_win32_events() override;
+
     /**
      * Send a callback message to the host return the response. This is a
      * shorthand for `sockets.vst_host_callback.send_message` for use in VST3