Upgrade to CKAN 2.11

[ntwalibas]

Description

This PR does a few changes required for updating to CKAN 2.11:

• Updates the UI as a few elements were broken after performing the upgrade.
• Adds the get_site_statistics function to the helpers as it was removed from core CKAN helpers.
• Upgrades the Axios library to a new version that fixes a known CSRF vulnerability.

This PR relates to

• fjelltopp/fjelltopp-base-images#12
• fjelltopp/fjelltopp-ansible#39
• fjelltopp/fjelltopp-infrastrcture#310

Dependency Changes

The Axios React library has been upgraded to account for a potential CSRF vulnerability.

Checklist

• The Jira ticket for this issue has been updated to "Ready to Review" or equivalent.
• I have developed these changes in discussion with the appropriate project manager.
• My code follows the general Fjelltopp documentation (see Confluence).
• I have made corresponding changes to the Fjelltopp documentation (see Confluence).
• I have rebased this branch with master.
• New dependency changes have been committed.
• I have added automated tests that prove my fix is effective or that my feature works.
• New and existing tests pass locally with my changes.
• My changes generate no new warnings.
• I have performed a self-review of my own code.
• I have assigned at least one reviewer.
• I have assigned at least one label to this PR: "patch", "minor", "major".

[jonathansberry]

Few changes to look at - hopefully all super easy to address.