Created attachment 1541 [details]
Add From header to account templates
This patch enables setting the From header override option in account templates, as it is in folder templates.
This is meant to address use cases such as bug #2168, #2080, and discussions had in IRC, so that a user can set the From header of a message reply based on the To header of the quoted message, by using %t for the account's reply template From override. The From override is also enabled for composing new messages, so that a user may set a From address dynamically.