fix: mobile device applications - various

[neilmartin83]

Change

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Various fixes as a result of investigating why some mobile device app settings wouldn't change/update/set. :-)

• Set bools to pointers to ensure they are not empty if set to false
• Correct struct hierarchy - moved scope, vpp and others out of general and into root level
• Add missing field keep_app_updated_on_devices
• Updated examples to handle bool pointers
• Ensure we return the app ID after create (it's not in the root of the XML structure, same as ldapservers...)
• Refactored scope structs to match mobile device profiles

Type of Change

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• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update (Wiki)
• Refactor (refactoring code, removing code, changing code structure)

Checklist

• I'm sure there are no other open Pull Requests for the same update/change
• My corresponding pipelines / checks run clean and green without any errors or warnings
• My code follows the style guidelines of this project
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation (readme)
• I did format my code