The maxlength of the confirmation_url form field is too short.

Hi again and thanks for your great work =)

As I told you in my last ticket, I abuse your module partly as replacement for additional exposed form blocks.
In my current use case I got the problem, that the confirmation URL settings field is too short to place 3 or more tokens in it.
I tried to archive the following url:
/search?s=[yamlform-submission:values:name_technology]&radius=[yamlform-submission:values:proximity]&location=[yamlform-submission:values:city_postal]

As you see, the URL itself isn't really that long, it's just that the tokens blow up the informations.
Would be great if you could extend this formfield a bit for easier use with tokens.

Patch is following...