The statistics page is not working correctly and displays wrong information

[aeshub]

Describe the bug
The statistics page is currently not working and gives the wrong information. For example, I ran two missions which were successful and one partly successful and the statistics page claimed only one mission ran that day but counted the tasks for both of them.

Investigate the math in the feature and fix it.

To Reproduce
N/A

Expected behavior
The statistics page should either be correct or be hidden/deleted.

[Eddasol]

Stats are only iterating over failed and successful missions, but there are many other mission statuses as well. Partially successful missions will not be included with the current code