Ensure `create` tasks have non-empty text before submitting

[fozziethebeat]

When a user accesses any create task, they have the ability to submit an empty string. This violates a requirement from the backend. We should disable to submit button until they've typed something.

[melvinebenezer]

I can take this up

[fozziethebeat]

@melvinebenezer Have you had a chance to look into this?

[melvinebenezer]

@fozziethebeat Yes, will give a fix today