Urls in report are generated incorrectly

Problem/Motivation

All the url's in the report table have an extra / at the beginning, e.g. //admin/content/files/replace... They can't be clicked on (in chrome).

Also the links to the actual files have 'sites/default/files' hard coded. This does not support sites who have their public files in a different location or multi-site installations.

Steps to reproduce

Install and try to click on URLs in chrome

Proposed resolution

Remove leading / from url paths in code.

Use $file->createFileUrl() to generate file URLs

Remaining tasks

User interface changes

API changes

Data model changes