Importing Permissions with Overwrite Option

[miljance]

Summary

With this change, I have enabled the user to be able to overwrite permission sets contained in the import file. Up until now, the permissions from the import file were merged with the permissions already present in the permission sets.

The majority of changes were done in this repo but the text for a confirmation dialog has been changed in the repo containing the Base App
https://github.com/microsoft/BusinessCentralApps/pull/1287

Description of the problem

Importing user defined permissions sets leaves permissions in inconsistent state.

Users tend to test the permissions sets in multiple rounds in a test system. After they are satisfied with the result they decide to import it in a production. However the outcome of the import is not reliable. Users would like to overwrite current user defined permission set with preserving assignment to the users/security groups. Currently if a permission set is imported there are two problems:

1. If in a test systems some permissions were reduced to indirect or removed those changes do not get imported into permissions.
2. If a permission for a certain object is removed in a test system and then exported and imported to production the permission cannot be removed.

That means that importing permission sets is basically "additive" and can only give more "power". There is no easy way to import XX permission sets that are already assigned to users or security groups and that those are imported "as is" in the import file.

Work Item(s)

Fixes #3162
Fixes AB#559224

[JesperSchulz]

@stkillen, could you give this a review?

[stkillen]

Looks good, please resolve the comments and fix the build errors before we can merge.

[stkillen]

Re-running build and tests