[BUG] Dynamic-Voice-Channel Bugs

[PantomInach]

• When user is alone in channel and mutes or unmutes (Changes voice state) himself another channel is created.
• When channels "xxxx 1" and "xxxx yyyy 1" exist, members joining "xxxx" will affect channels "xxxx yyyy"
• Race condition when joining and leaving channels fast, which will result in a move operation without a target
• Race condition when two people join numbered channel, resulting in two new empty channel