Add support to select icon with String

[erickvelasco11]

Hi team
Thanks for this useful library. In my use case, I need to show a list with an Icon and two texts. The thing is the list is retrieved from a database where all items are parametrized. The icon is also parametrized so, when I receive the list, in each item I have the icon number (qrcode, phone, close, ....)
Would be great if I can parse that string to an Icon and vise verse.

However, thanks again for your work

[DevSrSouza]

Thanks for the suggestion! Should be supported at the next release!