Merged conversations

[avaidyam]

Be able to merge conversation with person Test1 and person Test2 together, even on different networks or the same network; reply panel will have a small extension above it to indicate reply mode and allow changing it (i.e. Replying to Test1 on Hangouts vs. Replying to Test2 on Messenger). Also, an automatic selection would be beneficial (Reply via matching the last delivered message).