Fix/community info validation

[henriquecbuss]

What issue does this PR close

Closes N/A. Issue brought up by Luiz on Slack

Changes Proposed ( a list of new changes introduced by this PR)

These are all regarding the community information page (/community/settings/info)

• Set community description field as required
• Show validation errors when clicking save
• Focus the top-most input that has an error

How to test ( a list of instructions on how to test this PR)

1. Go to /community/settings/info
2. Make a field invalid (e.g. empty description, empty name, invalid website url, empty subdomain)
3. Click save and see if there is an error below the input, and you're automatically scrolled there

[lucca65]

👍 Nice! I'm working on fixing the event-source digestion of the update contract call!