Removed several HELP buttons that doesn't work

Allows to close the disk type selection window

src/devede/choose_disc_type.py

@@ -203,4 +203,9 @@ class choose_disc_type(GObject.GObject):
         final_text = text1+text2+text3+text4+text5
         textbuf.insert_at_cursor(final_text,len(final_text))
         window.run()
-        window.destroy()
+        window.destroy()
+
+
+    def on_wselect_disk_destroy_event(self,w):
+
+        Gtk.main_quit()