MDN Docs: Make Experimental features in Firefox more legible

[chrisdavidmills]

The tables on Experimental features in Firefox are hard to read because the cells with lots of content are very narrow due to the flag feature column having content that can not be wrapped.

https://developer.mozilla.org/en-US/docs/Mozilla/Firefox/Experimental_features

Options to make it more legible include 1) making it into a definition list or unordered list, adding some CSS along with a button that converts the table to a list layout using CSS and generated content for legibility, 3) adding a width to the columns and making the last one overflow scroll, and 4) some other idea.

[Elchi3]

This has not happened in the sprint "Golf Hotel" and isn't planned for the next sprint. Removing the milestone.

[Elchi3]

Oh wait, it actually is in the next sprint. Updating the milestone.

[a2sheppy]

This work is now complete.

[Elchi3]

Looks great! Well done!