This build brings mainly bug fixes and tweaks - notably improvements to the User Media object's camera input, which can now correctly select the input source and preserve the camera display aspect ratio. There's also a new ability to add an optional 'Back' button to the caption of Windows 10 Store apps on desktop, which also triggers the Browser object's 'On back button'. Windows 10 Store apps also no longer depend on the WinJS library, which should bring a bit of an improvement on app download size, memory use and startup time.
The new 'Set back button visible' action went in the "Windows 8" plugin, but the name is somewhat misleading now, so we also renamed the plugin to "Windows Store" instead to more clearly identify that it works with Windows 8, 8.1 and 10.
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