Password validation on sign-up.html

[franznoel]

Fix the password validation on sign-up.html. Issue is with password and confirmPassword fields.

[franznoel]

Improved consistent validation by disabling autofocus and onkeypress to accommodate the errors on sign-up.

Validation will only work on submit. Applicable to forms such as:

• event.html
• sign-up.html
• user-profile.html