Move CMS Frontend to the Angular:latest

[korel-san]

Context

Goal: Make CMS Frontend part scalable, extendable, high-quality UX, exclusive of dependencies vulnerabilities.

Expected result

• user-friendly interface
• error handling
• increase security (including removal all dependencies with possible vulnerabilities)
• less copy-pasted code
• less redundant code

Current result

• none from the list above

Possible Fix

It would be better to use the last version of libraries (e.g. Angular:latest) because it has the most stable, well-tested and reusable tools and patterns (the specific cases which were handled manually, now have more standard/common ways to resolve).