[connmanengine] On configuration removal, take it away from foundConfigurations

Prevents derefence of freed QNetworkConfigurationPrivate pointer in
QConnmanEngine::getConfigurations().
Merge pull request #27 from xhaakon/master

[connmanengine] On configuration removal, take it away from foundConfigurations
Merge pull request #28 from lpotter/master

make QNetworkConfiguration Discovered dependent on autoconnectable servi...
Implement some simple basic theme hints.

We need to do this here, not QtWayland, so that all applications get them.
QtWayland uses QGenericUnixTheme.
make 'AlwaysAsk' if found help determine whether the configuration is
Discovered or not.

Since bearer has no idea about user interaction, we just do this,
and make the roaming/always ask scenario unavailable.