useFlexLayout should support fixed width columns

[Metavirulent]

It is currently not possible to define a fixed width for a column using flex layout.
A common use case is that a column contains a checkbox for example and should not grow.

If minWidth and maxWidth are the same, then the corresponding flex should not be 'width 0 auto' but '0 0 width' so it doesn't grow.

[jitenderchand]

Facing the same issue

[coreybruyere]

@Metavirulent @jitenderchand - you ever find a work around for this?

[sashaslow]

u can use canResize: false