add a total number, and a graph with one day granularity for `how often the fileimporter special page was visited`
 add a total number, and a graph with one day granularity for `how many files were successfully moved`
 add an mean/median / max / min number `for how long it takes` between users clicking the "import button" and redirecting to the commons page of a successful transfer for the past day and averaged per day
We want to have an overview if the restrictions we impose are too hard, or rarely a problem. Therefore, please track
 how often the import fails because of any exception, seperated by the reasons.
 Show the mean, median, 50% 75% 90% cases for `number of file revisions, number of text revisions, and total MB moved` for files that were attempted to be moved
| FileImporter ]]