How do I force start Repository Replication in version 4.X

In version 4.0 one can easily trigger a Repository Replication from the main 'Repository' section. In order to manually trigger an already configured replication you will need to go to:

[UI] --> [Admin tab] --> [Repositories]  --> [Choose the type of repository you are looking for (Local or Remote)] --> [Click on the relevant repository's "Play" button on the replication column].