fix search bar allows to connect to a sub address without a tld

[plebeius-eth]

it should check if the address is either a valid IPNS public key or contains a dot (for the tld), and no spaces or slashes

[plebeius-eth]

f4798f3

[estebanabaroa]

you should not validate the domain, plebbit-js already validates it. otherwise you'll have to change the validate code any time we add a new domain or new key

displaying the useSubplebbit().error should be enough to tell the user what to do

[plebeius-eth]

a40442d

removed the validation checks and displaying the error message