Ability to upload components from the UI to a repository

The goal of this issue is to have the ability to upload components from the UI to a repository.

This feature exist in nexus 2 and is very useful to upload component for the 3rd party.
Morever, in the nexus 3 we don't have a default repository for this kind of library (3rd party).

See below the documentation in nexus 2:
https://books.sonatype.com/nexus-book/reference/using-sect-uploading.html

At the time being, to have the same in Nexus 3 see below the workaround :

• I need to create a hosted repository
• I uploaded component with mvn command line (deploy file) like below :

https://maven.apache.org/guides/mini/guide-3rd-party-jars-remote.html
http://maven.apache.org/plugins/maven-deploy-plugin/usage.html

Little description of 3rd party :

3rd Party
This hosted repository should be used for third-party dependencies not available in the public Maven repositories. Examples of these dependencies could be commercial, proprietary libraries such as an Oracle JDBC driver that may be referenced by your organization.