Fix vertical centring in IE11.
Fix vertical centring in IE11.

Can't use flex box because bugs. https://developer.microsoft.com/en-us/microsoft-edge/platform/issues/101487/

mdn/viewsourceconf,mdn/viewsourceconf,hoosteeno/viewsourceconf,mdn/viewsourceconf,hoosteeno/viewsourceconf,hoosteeno/viewsourceconf