Resize the window together with ConfigureNotify

This way we need less hacks and things can't get out of sync.

src/wine-host/editor.h

@@ -57,16 +57,6 @@ class Editor {
 
     void close();
 
-    /**
-     * Resize the window to match the given size, if open.
-     *
-     * @param new_size The rectangle with the plugin's current position.
-     *
-     * @return Whether the resizing was succesful. Will return false if the
-     *   editor isn't open.
-     */
-    bool resize(const VstRect& new_size);
-
     /**
      * Embed the (open) window into a parent window.
      *