Clean up Trac components

We should clean up the Trac components a bit. I just tried out renaming components and it seems to work fine as long as we update reports manually.

I already renamed:

• Tor - Metrics -> Metrics
• Tor - Torbutton -> Torbutton (and updated report 14)

I suggest we rename the following components:

• Android (Orbot)-Backend / Core -> Orbot
• Polipo-Backend / Core -> Polipo
• Tor - BridgeDB -> BridgeDB
• Tor - Company -> Company
• Tor - Distribution -> Distribution
• Tor - Tor VM -> Tor VM
• Tor - Tor bundles/installation -> Tor Bundles/installation
• Tor - Torctl -> Torctl
• Tor - Torify -> Torify
• Tor - Website -> Website

This affects reports 8, 10, 11, 12, and 20, as far as I can see.

I'm happy to make the changes unless some objects.