IMG tag alt attributes are unnecessarily limited to 100 characters

When adding images, it's important to include alternate text, primarily to be spoken by assistive technology. I'm glad to see Drupal/ELMS has this built in as a requirement. It's also just as important to be concise, for normal pictures. A normal picture would be something like a family pet. Good, concise alt text could be alt='our family pet'.

However, this unnecessarily limits including alt text in images that represent mathematical equations. Something as simple as the ubiquitous quadratic formula comes in at 99 characters, when described in plain English. It's only 44 characters when using LaTeX as the alt text.

It doesn't take long before even using LaTeX, you've exceeded the arbitrary* 100-character limit. Take this not-too-complicated summation expression, for example. It's 125 characters when coded as LaTeX.

*I believe the 100-character restriction is only somewhat based on WCAG/508 guidelines, but nowhere in those guidelines is the 100-character suggestion reasonably interpreted as a hard limit to be used in all situations. It's merely a suggestion, to promote concise explanations. Such concise explanations can't always be employed when describing mathematical formulas or processes.

Please re-consider this, and either remove the 100-character alt text restriction, or provide an options setting that's perhaps a checkbox that's checked by default -- for the 100-character restriction -- but which would allow the site owner to uncheck if need be, for situations such as I've outlined.

Thanks