bug: editor content from distinct chat spaces is shared

[yjane99]

Steps to reproduce:

1. Click on Reply in some chat space
2. Then navigate to another
3. Observe that the Editor content from original chat space is retained.

Expected Behaviour:
Editor should maintain content separately for each channel/ DM (chat space)

e.g.: reply to message from 'events' channel was retained in the editor when navigated to 'general' channel.