Separate Project Name from Project URL string

### Description

Currently the project name is used for the first part of the URL.
This means that project names are then limited to being lower case characters numbers and hyphen.
The project name is then used in additional area of the UI and in the Node-RED theme.

We have had feedback that users want to have more freedom in the formatting of the Name, so I am proposing to introduce a project URL which has the same restrictions as the current name and make Name a free text field with appropriate limits on length & characters.

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