Proposal: max-width on app-component-viewer

[willshowell]

I haven't fully investigated if this would be appropriate everywhere, but when reading the component overviews on a full screen (> 1500px), lots of paragraphs get stretched out to one line and the legibility and reading comfort is lost.

I suggest setting a max-width of about 800-900 px and centering it in its parent.

Before

After

[jelbourn]

It's so obvious now that you've pointed it out. I'd set the max-width to 940px (copying the Android docs).

Feel free to send a PR!