Mobile: preserve auto download status [2/3]

Hook up the new preference to the UI. So now, an earlier choice
if automatic or manual download to the cloud is preserved in
between sessions. Strictly speaking this fixes issue 1725.

Notice that there is also a higly related syncToCloud thing
present. As factoring out that seemingly duplicate piece
of code is non-trivial, this will be done in a seperate
commit.

Signed-off-by: Jan Mulder <jlmulder@xs4all.nl>

mobile-widgets/qml/CloudCredentials.qml

@@ -144,6 +144,7 @@ Item {
 				text: qsTr("No cloud mode")
 				onClicked: {
 					manager.syncToCloud = false
+					PrefCloudStorage.cloud_auto_sync = false
 					prefs.credentialStatus = CloudStatus.CS_NOCLOUD
 					manager.saveCloudCredentials()
 					manager.openNoCloudRepo()