Refactor/submit button disabling

[shayan-golafshani]

Created an intuitive error-handling that prevents users from submitting answers, unless the answer input is filled out. Additionally, I made the OnlyDevs, header a link, back to the home page. I primarily changed CSS to disable the cursor and then and make the button background red when disabled.

Description

I used hooks inside of onChange for the input, to set the state of the submission button. Then, I check for the length of the input field to make sure if users delete text, they still can't submit an empty answer to our database.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Refactor

Motivation and Context

This change makes the UI more intuitive for the user and gently prods them to submit something in the answer form.
Before this, they were able to submit an empty answer, and that could overload our server, plus they were able to answer the same question many many times.

Concerns

• Any bugs still present?
• Potentially we may want to disable the red background from happening immediately upon submission, because it may confuse a user, about whether or not they successfully answered the question.
• Next steps?
• We may want to add state to the 'go to answers' button and make that button gold. That way the user can know they successfully submitted an answer and they will be prodded to go look at that page.