Even though Cordova for iOS supports this preference, we don't expose a way to set it. The config.xml file favored by PhoneGap Build is such a way, but as I mentioned earlier in this thread our build process doesn't rely on config.xml.
We're looking into ways to expose those extra platform-specific Cordova preferences that are set at build-time, whether in a configuration file (XML, JSON, etc.) or a UI like Xcode's PLIST visualizer/editor, but right now we don't support setting any such properties.
I can't commit on a timeframe for this feature, as we're still evaluating upstream Cordova's changes to their preference system and config.xml format. As soon as things stabilize a bit and they stop changing the way preferences are set between each release, we'll introduce a way to change those properties.
the Telerik team
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