Minimize css a bit and make it better at overriding jupyter defaults

[jsignell]

Related Issue(s):

• 1310

Description:

Kind of hard to reproduce, but even if this is a noop in many cases the reduction in size will hopefully be compelling.

For a notebook containing an executed version of the following:

search = client.search(
    max_items=10,
    collections=['sentinel-2-l2a'],
    bbox=[-72.5,40.5,-72,41]
)
search.item_collection()

The saved size on this branch is 4.4M as opposed to 5.4M on main

PR Checklist:

• [x] pre-commit hooks pass locally
• [x] Tests pass (run scripts/test)
• [x] Documentation has been updated to reflect changes, if applicable
• [x] This PR maintains or improves overall codebase code coverage.
• [ ] Changes are added to the CHANGELOG. See the docs for information about adding to the changelog.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (679eaff) 91.18% compared to head (605cc45) 91.18%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #1311 +/- ## ======================================= Coverage 91.18% 91.18% ======================================= Files 51 51 Lines 7023 7023 Branches 1005 1005 ======================================= Hits 6404 6404 Misses 444 444 Partials 175 175 ```

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[jsignell]

I just confirmed that this resolves this issue in the jupyterhub where I originally encountered it: