Intermittent glitch loading chart on landing page/index.html

[jonathancrabtree]

Every once in a while (maybe 1 in 10 page loads) the "Download" button is partially obscured (but still works):

It's basically a less-severe version of #63 and the long term fix is the same, which is either to eliminate the instability in the page layout (i.e., things jumping around as content and/or CSS loads) or ensure that the affected elements are loaded/displayed/positioned until after everything else has loaded and the layout has stabilized. I believe the Chaise/Navbar team is looking at making sure that their Chaise-specific CSS doesn't inadvertently conflict with other directives on the page, in case that is contributing to the problem. We may need to simplify the page layout (fewer flex boxes if possible) and/or look more carefully at the order in which CSS and content files are loaded.

[jonathancrabtree]

I believe I've fixed the layout thrashing (at least in the horizontal dimension) that was giving rise to this bug. It was committed today and I assume it will show up in app-dev tomorrow so we can test it out. I've also made some improvements to the responsiveness of the landing page, but I'll discuss those over in #79.

[jonathancrabtree]

After addressing the layout thrashing issues I'm no longer able to reproduce this bug on app-dev.

[jonathancrabtree]

Leaving issue open for testing in next release.