Prepend a cursor movement (Up/Down/PageUp/PageDown) with a multiplier
(e.g 23+Down, that is '2' then '3' then 'Down') to increase the
movement's length.
Envelope can now only be accessed from within a RwLock. Two new structs
are introduced: EnvelopeRef and EnvelopeRefMut. These hold a reference
to an Envelope and the mutex guard that keeps them alive.
This change allows sharing of the envelopes hash map amongst threads.
Page movements is an enum that describes the movements of the keyboard
keys "Home, End, PageUp, PageDown". Some mail listing Components
interpret these keys as changes to their cursors.
If a listing lists search results, ie when "filtering" with a filter
term, it sets up its state in filtered_selection, filtered_order etc.
set_coordinates() should reset that state.
By convention the valid values at any time of a cursor_pos in mail
listings is in self.new_cursor_pos, which the listing compares with
self.cursor_pos to detect position changes. Returning
self.cursor_pos values with coordinates() is invalid.
Each account had one mailbox per folder, which had one associated
collection. Now each Account has one Collection for all folders and each
Mailbox object holds only the hashes of each message.
Collection also gets Threads for each folder in order to mix messages
(ie from/to Sent folder).
Insert Sent emails in chronological order
if inserted unsorted, mails a, b with a happened-before b, might never
get added.
Fix multiple insertions in ThreadTree upon insert_reply
insert_reply was creating multiple copies in threading
Manos Pitsidianakis