* Showing notifications if any for any response with status 400 >= x < 500.
* fixes valFormManager
* Updates logic for the valpropertymsg.directive to simplify it and so that it doesn't need to query the DOM which was causing issues with timing.
* commits package-lock
* fixes some issues with the securityinterceptor, properly nests promises in contentEditingHelper, fixes errors occuring when not handling promise rejections due to validation problems,
* another unhandled potential validation problem
* Merge branch 'temp-U4-7757' of https://github.com/lars-erik/Umbraco-CMS into lars-erik-temp-U4-7757
# Conflicts:
# src/Umbraco.Web.UI.Client/src/common/services/umbrequesthelper.service.js
* cleans up the interceptor objects and puts them in appropriate modules and files, centralizes the logic to show notifications so that only happens in one place.
* Fixes more places where notifications were manually shown.
* Fixes validation with the variant publishing overlay and html descrepencies
