No way to move a post to a new or existing thread

Please give a quick overview of your product feature request or feedback and note who in your org is affected by this issue [ex. agents, admins, customers, etc.]. (2-3 sentences)

When a user makes a post to an older thread, or if the thread is starting to go offtopic, it is often useful to have the option to move the post to a new or existing thread

What problem do you see this solving? (1-2 sentences) 

This will help keep threads uncluttered and provide us with the ability to help customers more efficiently.

When was the last time you were affected by this lack of functionality, or specific tool? What happened? How often does this problem occur and how does this impact your business? (3-4 sentences)

This issue appears a few times a week.

Are you currently using a workaround to solve this problem? (If yes, please explain) (1-2 sentences)

There is no workaround for this issue, except instructing users to create a new thread, which is additional manual work for them/

What would be your ideal solution to this problem? How would it work or function? (1-2 sentences)

A button in the gear wheel dropdown that gives you the option to move the post to a new thread.  Having the ability to move a post into an existing thread would be a nice bonus, but isn't nearly as critical.