[R&D] Investigate browser cookie size limitations

It looks like browsers have a limit to the number of cookies per domain. We should investigate how this impacts the way we use cookies to store access tokens. Currently we have a separate cookie with the access token for each cluster you've selected in the dropdown. If there are several hundred, we'll go over the limits. We need to understand what happens when the limit is exceeded. This might require use to change how we store the token or only keep the n most recently used session cookies.

https://stackoverflow.com/questions/640938/what-is-the-maximum-size-of-a-web-browsers-cookies-key

http://browsercookielimits.iain.guru/

Acceptance Criteria

• Understand what the limits are for the browsers we support
• Determine what happens when we go over the limit. Does it break console?
• Investigate and recommend a possible solution: for instance, limiting the number of active cookies or setting expiration on the cookies
• Open a JIRA story to implement solution