🟢 Fixing eslint issues that cause the Circle-CI build failure(s)

This PR is two-fold:

fixing eslint errors and warnings to ensure the success (at least on the eslint front) of the Circle-CI build
bumping up the @tailor-cms/core-components version

As a reminder, once the PR has been approved and merged, we should publish the new version of the core-components to npm.

@underscope please review, when you get a chance, to ensure that eslint issues have been addressed in a satisfactory manner. Some of the resolutions are a product of a gut feeling and might not be aligned with our company-wide or repo-wide coding standards/guidelines.

cc @MiroDojkic - since some of the lines I've touched have been written by you, you might want to 👀 . Don't feel obligated.

To do:

[ ] Publish the new version of @tailor-cms/core-components
[ ] Updating the Tailor dependencies to include the latest version of the @tailor-cms/core-components

Sidenotes:

There are some fixes for the missing icons issue, caused by a recent MDI version bump.

ExtensionEngine / tailor

🟢 Fixing eslint issues that cause the Circle-CI build failure(s) #992