Snow Toolbar buttons do not have a name or ID

[micrology]

Both the W3C HTML checker and Chrome DevTools complain that the toolbar button code generated by Quill with the Snow theme lacks an id or name attribute, which is recommended for form fields. In fact, the buttons are not in a form field, but still the warnings are a nuisance and the warning could be simply dealt with by including an id for each button.

Steps for Reproduction

1. Go to the Quill playground using Chrome
2. Open DevTools
3. Observe the "Issue": A form field element should have an id or name attribute.

Expected behavior: No warnings Actual behavior: Warnings Platforms: All

Version: 2.0.2