.cfg to .dlgcfg

* /test/test_lib/test_config.py - changed.cfg to .dlgcfg
* /lib/assets/lib/config - renamed all .cfg files to .dlgcfg
* /lib/config.py - Changed .cfg to .dlgcfg
* /lib/config.py >saveConfig() - Removed residual dirty flag check that
didn't do anything