Extracted an InspectorFloretFormatter to customize the InspectorFloret

[brototyp]

This PR extracts an InspectorFloretFormatterType from the InspectorFloretto be able to customize it. One specific use case for this is when using GraphQL for network requests. Pretty much all information in the list will be the same (everything but the data), since for GraphQL:

• All requests are POST
• Responses are always 200
• The path is always the same

With this change, one can implement a custom formatter, that shows other data in the list for GraphQL requests, for example

• Ist it a Query or a Mutation
• What is / what are the methods

[brototyp]

@pstued, I would love your thoughts on it if you find some time.