Add support for "reply" and "forward" tags
Feature Summary
Geary should support "reply" and "forward" tags such as other mail client (thunderbird, mutt, ...)
Some reasons in favor:
- It is standard tags and a good practices to support it.
- If you use Geary among other mail clients. They will usually create these tags. So it may be confusing to see some emails with no "replied" tag just because you replied using Geary.
- One can think the "reply" tag is unrelevant with the conversation view used by Geary. But it is not. For example, if there is a long thread with lot of people involved, it could be very useful to see which emails inside this thread you replied or you transfered.
How would you like it to work
A good place to place these indicators is IMHO in the conversation panel inside the email title bar either close to the star at the right or at the left before initials.
Relevant links, screenshots, etc.