allowing input value overriding via props

[ghost]

updated render input function for it.

Use Case:

• When the field has default value
• When user enters value and selects values from options and wants to edit then the select value would be the input value as well

I would very much appreciated and be thankful if this PR can be merged at the earliest convenience!

I would immediately then update my package.json with the new release version of its npm module!

@JedWatson @bruderstein @bvaughn , just tagging few major contributors who can review and merge as its a major urgent requirement.