provide workarounds for cross-browser bug
Fix: IE10-11, containers with display: flex and flex-direction: column will not properly calculate their flexed childrens' sizes if the container has min-height but no explicit height property
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Fix: IE 11 does not vertically align items correctly when min-height is used
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Fix: When using align-items:center on a flex container in the column direction, the contents of flex item, if too big, will overflow their container in IE 10-11.
the content of box would not overflow this box