Improve consistency in project statistics popup

[vasily-pozdnyakov]

Is your feature request related to a problem? Please describe.
The data at the project statistics popup is messy. Think about the data which would be helpful for users, maybe propose additional graphs, rearrange the existing data, etc.

Describe the solution you'd like
Make a clear plan how the statistics popup can be improved. There should be a clear separation between signals, files, attributions, licenses, etc.

Additional context
The current state might be confusing as the terms "signal" and "license" are often interchangeable at the popup.