[Feature request] Group all Telegram contacts

[Hexcles]

Currently, all contacts from Telegram are listed under "Ungrouped" in Empathy. (I believe Telegram doesn't have the concept of contact groups after all.) This makes finding Telegram contacts in Empathy quite hard when there are a lot of "ungrouped" contacts from other accounts. It'd be good to automatically put all Telegram contacts in a group (say called "Telegram"), which telegram-purple seems to do.

I'm actually not sure if this is a good thing to do (some people might prefer seamlessly mixing of contacts from various accounts together), but for me it's quite useful.