Bug 837767 - Make GetMinimum() uses ConvertNumberToString(@value) if @min isn't valid. r=smaug

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extra : rebase_source : a64a1a4f06be7720ca75d9179db794631d40803c
Bug 781573 - Implement the step attribute for <input type=time>. r=smaug

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extra : rebase_source : 802145c921a679d041f83212e872cc5583ed4cc9