fix: style leaking in extension mode and app table loading hover

[johnlcos]

PR Checklist

• Linting Test is passing
• Code is well documented
• If applicable, a PR in the epinio/docs repository has been opened

Summary

• To prevent styles from leaking while in extension mode, narrow the check from including 'epinio' to starts with '/epinio'
• Fix the hover color on the apps table

Occurred changes and/or fixed issues

Technical notes summary

Areas or cases that should be tested

Areas which could experience regressions

Screenshot/Video

[dcharles525]

LGTM