Move the editor handling back to Vst2Bridge

Since we can have multiple editors in Vst3Bridge.

src/wine-host/editor.h

@@ -14,6 +14,8 @@
 // You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
+#pragma once
+
 // Use the native version of xcb
 #pragma push_macro("_WIN32")
 #undef _WIN32