Remove complex 'disabled' logic
Remove complex 'disabled' logic

Setting 'disabled' on the input will prevent the button from clicking it.
Don't need to track state in a `buttonEnabled` var.

rvarshney/code-dot-org,pickettd/code-dot-org,pickettd/code-dot-org,pickettd/code-dot-org,bakerfranke/code-dot-org,ty-po/code-dot-org,bakerfranke/code-dot-org,dillia23/code-dot-org,dillia23/code-dot-org,dillia23/code-dot-org,bakerfranke/code-dot-org,pickettd/code-dot-org,rvarshney/code-dot-org,cloud3edu/code-dot-org-old,dillia23/code-dot-org,cloud3edu/code-dot-org-old,rvarshney/code-dot-org,ty-po/code-dot-org,rvarshney/code-dot-org,pickettd/code-dot-org,bakerfranke/code-dot-org,cloud3edu/code-dot-org-old,bakerfranke/code-dot-org,bakerfranke/code-dot-org,rvarshney/code-dot-org,pickettd/code-dot-org,dillia23/code-dot-org,cloud3edu/code-dot-org-old,cloud3edu/code-dot-org-old,ty-po/code-dot-org,pickettd/code-dot-org,ty-po/code-dot-org,ty-po/code-dot-org,dillia23/code-dot-org,ty-po/code-dot-org,bakerfranke/code-dot-org,dillia23/code-dot-org,rvarshney/code-dot-org,ty-po/code-dot-org,pickettd/code-dot-org,rvarshney/code-dot-org,dillia23/code-dot-org,ty-po/code-dot-org,cloud3edu/code-dot-org-old,cloud3edu/code-dot-org-old,rvarshney/code-dot-org