Resolve ISE when saving a part; also, now removed the last reference to
  _myconfig, so remove it from the setup section of the request handler.
(grafted from 63ee3b1607c9921c54ee851842eed7058ecfd249)

--HG--
extra : source : 63ee3b1607c9921c54ee851842eed7058ecfd249
Fix #1115: Error when saving assemblies.
(grafted from 394878d6b8d623ead77bafcf918e9576c1b263b7)

--HG--
extra : source : 394878d6b8d623ead77bafcf918e9576c1b263b7