Factory : Dashboarding wrongly displayed values

[mikbry]

Describe the bug
Fix values rounding and display them according.

To Reproduce
Steps to reproduce the behavior:

1. Create several users using webchat publish
2. Chat a little using them
3. Go to the factory dashboard
4. See the mess

Expected behavior
Values should be rounded correctly.
Session duration is not calculated correctly and if the value is too big switch to seconds or minutes instead of ms.

Screenshots