Add loadConfig function for reloading .conf on top of settings.
Add loadConfig function for reloading .conf on top of settings.

The .conf file must be loaded on top of the configuration instance as it
exists in memory, otherwise settings will not be persistent.

 * FIXES part of #9277.

mmaker/bridgedb,mmaker/bridgedb,wfn/bridgedb,pagea/bridgedb,pagea/bridgedb,wfn/bridgedb