Close the plugin channel when stopping it
Close the plugin channel when stopping it

This avoids a 30 second long wait in the QProcess destructor, when the plugin
is not responding to the cancel request.

plotters/accounts-sso.signond,maemo-foss/accounts-sso-signon,plotters/accounts-sso.signond,maemo-foss/accounts-sso-signon,maemo-foss/accounts-sso-signon,plotters/accounts-sso.signond