Settings: get<>(); pass arguments more efficiently
Settings: get<>(); pass arguments more efficiently

Settings::get() and SettingsGroup::get() allow concise and efficient
type-specific interface to value(); instead of wrapping your
defaultValue into a QVariant, just pass it to get() instead of value().

QMatrixClient/libqmatrixclient,QMatrixClient/libqmatrixclient,Fxrh/libqmatrixclient