[Proxy colonies M3] feat: implement form validation of a proxy colony's balance #4193
Description
Specification
Story
As a user making a cross chain simple payment action, I want to see an error if the proxy colony doesn't have enough funds.
Description
After M2 is completed and we know the balance of tokens per chain, we need to query the database for info on available balance then put that as the maximum for the field.
Implementation
This issue is complete when...
- Users can't create actions paying out more than the available balance on each chain
- Existing validation still works as intended.