Add more metrics

New metrics should be added to have the following informations:

• The extension type for Direct Edit
• How many docs a user black list in Sync
• The max depth of the blacklisted docs compared to the sync root.
• A sync conflict has appeared
• A sync conflict has been resolved (and the choice done)
• How many documents in a Direct Transfer session
• The DT session contains a folder (not a new one)