There shouldn't be multiple places to change a project name
### Original Description
I have needed to rename projects a few times. The first few times, I'd go to project settings, and the first form field is the project name, so I rename it. Then later discover that didn't actually change the name of the repo. So I dig more, and find another section below where I can change the repo name and the project name. This is unintuitive. If the first form field wasn't there, I might have gone looking for another section, but it's misleading to have a single form field up top and more elaborate fields elsewhere. There should only be one place to rename a project, and you should see both the pretty name and repo name at the same time.
### Proposal
#### Changes to the 'General project settings' section
Change the 'Project name' field label to 'Project {+display +}name'
Add a help text line below this field:
> This is the name you will see when browsing GitLab. To change the name of the repository, go to Advanced settings.

#### Changes to the 'Rename repository' section
Remove the 'Project name' field from this panel.
Rename the 'Path' field label to '{-Path-}{+Repository name+}'
Add a help text line below this field:
> This is the name of the git repository. It is also part of the URL you must use when visiting this project in a browser.
Rename the 'Rename project' button to 'Rename {-project-}{+repository+}'

issue