Re-enable using .signature
As pointed out in #239 (closed), there now isn't any UI for enabling .signature files any more.
To make this work, the now effectively redundant AccountInformation::use_signature
property should be renamed to use_dot_signature
, and if that is true and there is not a valid sig set as an account preference using the editor, then ~/.signature
should be loaded.
I don't envision adding any UI for this - people who care about ~/.signature
files should be equally happy to search the FAQ and and edit geary.ini manually.