This restores some old behaviour after teh WK2 port.
* src/client/conversation-viewer/conversation-message.vala
(ConversationMessage): Add alt_text param to ::save_image
signal. Replace ::set_action_param_string with
::set_action_param_string so we can pass a (url, alt_text) tuple for
the save_image tuple and update call sites. Set this tuple for the
action when enabling it, and pass the two values to the ::save_image
signal handler when activated.
* src/engine/api/geary-attachment.vala (Attachment::get_safe_file_name):
Add alt_file_name param method, use that when constructing a file
name. Add doc comment, test.
* src/client/application/geary-controller.vala: Updated to pass alt text
from save_imge signal emission all thr way through to
get_safe_file_name.
9f5def0d0f