RangePicker组件presets预设时间是计算的组件挂载时间

[rauki]

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What problem does this feature solve?

预设时间应该是点击时动态计算，而非按组件挂载时间计算 presets api应该允许通过函数动态计算范围

What does the proposed API look like?

预设时间如：近1小时，应该是点击时动态计算点击时往前推1小时