Describe your issue or idea

I often want to make text in various text areas smaller. Unfortunately Backdrop's implementation of ckeditor is lacking the ability to do so :(

From stack overflow:

 Search for CKEDITOR.config.format_h6 in ckeditor.js and add CKEDITOR.config.format_small={element:"small"};.

open the languagefile you want (e.g. en.js) and add "tag_small":"small text". now CKEditor supports the small tag.

Steps to reproduce (if reporting a bug)

Attempt to wrap some text in the <small> tag.

Actual behavior (if reporting a bug)

There's no <small> tag.

Expected behavior (if reporting a bug)

A <small> tag.

~PR by @quicksketch: ~PR by @BWPanda: PR by @quicksketch:

GitHub Issue #: