#519 Synchronize on Wi-Fi only

<vector android:autoMirrored="true" android:height="24dp"

    android:tint="#666666" android:viewportHeight="24.0"

    android:viewportWidth="24.0" android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">

    <path android:fillColor="#FF000000" android:pathData="M12,4L12,1L8,5l4,4L12,6c3.31,0 6,2.69 6,6 0,1.01 -0.25,1.97 -0.7,2.8l1.46,1.46C19.54,15.03 20,13.57 20,12c0,-4.42 -3.58,-8 -8,-8zM12,18c-3.31,0 -6,-2.69 -6,-6 0,-1.01 0.25,-1.97 0.7,-2.8L5.24,7.74C4.46,8.97 4,10.43 4,12c0,4.42 3.58,8 8,8v3l4,-4 -4,-4v3z"/>

</vector>

    <SwitchPreference

        android:defaultValue="@string/pref_value_wifi_and_mobile"

        android:icon="@drawable/ic_insert_link_black_24dp"

        android:icon="@drawable/ic_sync_black_24dp"

        android:key="@string/pref_key_wifi_only"

        android:summary="%s"

        android:title="@string/settings_theme_wifi_only" />