Set Main navigation as parent when creating new View menu links, not Administration

Problem/Motivation

When you create a new View and add a menu link, the parent is set to "Administration", where "Main navigation" would be a better choice, since that is more likely what the user wants, rarely "Administration".

Steps to reproduce

1. Create a new View
2. Select "Page settings"> "Create a page"
3. Select "Create a menu link"
4. See that the parent is "Administration" and not the more often used "Main navigation"

Proposed resolution

Set the parent to "Main navigation" by default, when you create a menu link in a View.

Remaining tasks

User interface changes

API changes

Data model changes

Release notes snippet