Add SidebarBottom to toggle sidebar filtering based on story status

[ghengeveld]

Fixes AP-3301, AP-3302, AP-3303

Also removes the "pending" story status, because it shows as an ugly "clock" icon and we don't really need to show the "in progress" state of a test in the sidebar.

Note: this depends on a canary version of Storybook and I had to downgrade to React 16 for Storybook compatibility.

📦 Published PR as canary version: 0.0.40--canary.45.460fa88.0

✨ Test out this PR locally via:

npm install @chromaui/addon-visual-tests@0.0.40--canary.45.460fa88.0
# or 
yarn add @chromaui/addon-visual-tests@0.0.40--canary.45.460fa88.0

[linear]

AP-3339 Allow sidebar filtering

[linear]

AP-3301 Add "filtered" mode to sidebar where it shows only stories with a given (aggregate) status

AP-3303 Add "filter" button to trigger filtered mode

AP-3302 Add "reset" button to exit filtered mode

[weeksling]

lgtm. Question regarding the new fixed version of storybook, and whether this should wait until that's stable to be merged

[weeksling]

@ghengeveld I approved from the look of the code, however testing this I couldn't actually see the filter menu in storybook. Is there anything extra you need to do to enable or, or should switching to this branch, running yarn and running yarn start show the new slot?

[tmeasday]

Code LGTM but we should work out what we are doing with errors. I'm OK with creating a ticket for that and merging as is though.