DRYD-2178: Accessibility > Resolve Redundant Title Alerts

[spirosdi]

What does this do?
Removes redundant title attribute from Table cell and header. react-virtualized adds a title attribute whenever the passed label is a string. So the title always duplicated the visible text. The changes are:

• In cellRenderer, wrap cellData in a fragment so that it stops being a plain string
• Fork default react-virtualized headerRenderer without the title

Why are we doing this? (with JIRA link)
https://collectionspace.atlassian.net/browse/DRYD-2178. A redundant title attribute triggers a WAVE a11y alert.

How should this be tested? Do these changes have associated tests?
Unit tests have been added

For manual test:

• In cspace-ui.js, update your package.json to use this version of cspace-layout, e.g.
  "cspace-layout": "file:../cspace-layout.js",
• run the devserver
• visit any page that contains a react-virtualized table. You may pick any of the pages mentioned in the jira
• using the WAVE browser plugin, inspect the page and confirm that no "Redundant link" error is reported

Dependencies for merging? Releasing to production?
Publish a patch release after merging

Has the application documentation been updated for these changes?
Changelog has been updated

Did someone actually run this code to verify it works?
@spirosdi ran it locally