COMPASS 685: fix flexbox redesign

[satyasinha]

This pr is a squash and merge of COMPASS-616
and includes fix of lint issues that were failing travis tests

[satyasinha]

@fredtruman the functional tests were failing because of this flex-shrink property here: https://github.com/10gen/compass/pull/749/files#diff-ccce7586ade2f8a7a5d8e4f27d02c1c6R28
it used to be set to 0. Do you think this is ok? It affects how resizing to a smaller view renders all the icons.

To give some context, the tests were failing because the delete buttons on Databases/Collections table were not visible on Travis (I'm assuming because it resizes to a smaller view?). @rueckstiess made the discovery that flex-shrink was affecting the minimum width and after this change everything still shows after resize takes place.

Also I'm closing the 616 branch to avoid confusion, everything you've done is already included here and rebased to master.

[satyasinha]

Note: I've added this method here to toggle the sidebar in functional tests but it's not being used at the moment. Can remove if it's too soon.

[rueckstiess]

Leave it in, good to have for the future.

[rueckstiess]

Looks good, passes tests, are we ready to merge this, @fredtruman? Or did you want to continue evolving it?

I think it's not taking anything away, so we could merge it to master now and you could continue on COMPASS-683 whenever you get a chance.

[fredtruman]

Oh man - I'm so sorry that it was such a silly issue causing the tests to break.

I owe you a 🍺

LGTM to merge. I'll continue on style tweaks with https://jira.mongodb.org/browse/COMPASS-683 when this is in.

Thanks!

[pzrq]

Thanks all, merging 👍

Looks like everyone's in agreement, merging so I can resolve any possible conflicts that may arise with #745.