* Allow to pause all devices on metered network connections (devices will
be automatically resumed when network is no longer metered)
* Allow to stop Syncthing when it was started via the built-in launcher
on metered network connections (it will be automatically started again
when the network connection is no longer metered)
* See https://github.com/Martchus/syncthingtray/issues/231
* Unify code paths for compiling expected SSL errors so in any case the
expected errors are including the error types emitted by the Schannel
backend
* See https://github.com/Martchus/syncthingtray/issues/223
Apparently the default before introducing the request timeout was not 30000
(which is the value of QNetworkRequest::TransferTimeoutConstant). There was
actually no timeout. So let's restore this behavior for now as the main
intention was to make the timeout configurable but not change any defaults.
Martchus