Editing issues for 3+ media posts T→D

[gappjust]

Steps to reproduce:

1. Send a message to Telegram with 3 or more media - bridged to Discord successfully
2. Edit message on Telegram - message is not edited, console logs [ERR] dcMessage.edit is not a function

[Exzender]

I'd say that this issue doesn't connected with number of media files.
Maybe that because of that fact that some messages are split up by telegram (for example, when different media types attached to the message) and transferred not as one message - and the mapping become broken as a result. Trying to edit such message leads to error - bot can't find corresponding message on Discord side.