send statesig when maximizing/restoring a window

ChangeLog

@@ -1,6 +1,8 @@
  (Format: Year/Month/Day)
 Changes for 1.0rc3:
 *07/02/23:
+   * Update EWMH state atom when maximizing windows (Mark)
+     Window.cc
    * Update titlebar buttons on reconfigure (Mark)
      Window.cc/hh
 *07/02/22:

src/Window.cc

@@ -1743,6 +1743,9 @@ void FluxboxWindow::maximize(int type) {
     m_resize_corner = old_resize_corner;
 
     moveResize(m_last_resize_x, m_last_resize_y, m_last_resize_w, m_last_resize_h);
+
+    // notify listeners that we changed state
+    stateSig().notify();
 }
 /**
  * Maximize window horizontal