Select: add renderFooter property

[Mr.Dr.Professor Patrick]

It will be useful to have some opportunities to render footer section in select popup. For example - to render apply button.

[zzman]

May be instead of renderFooter better have renderPopup ?

something like this

@korvin89

[Mr.Dr.Professor Patrick]

May be instead of renderFooter better have renderPopup ?

something like this

@korvin89

What about all complex select logic used in popup?
Hm. I've checked ur PR. Looks good I think

[Mr.Dr.Professor Patrick]

Added here #1312