Seemingly the intents in the task back stack got confused when the
pending intent was updated in those versions (the Accounts intent was
delivered to MessageList). Avoid that by not updating the current
intent, but dropping the old one.
Fixes issue #4955.
Previously messages in the local Trash folder were marked as deleted,
then deleted from the server. During the next sync the placeholders for
deleted messages are removed from the database.
Obviously this doesn't work for POP3 accounts because the Trash folder
can't be synchronized with the server. So, for POP3, we now immediately
clear out all messages in that folder.
The server search itself does work. But the results are not displayed
to the user because only the message headers of found messages are
downloaded and the subsequent search in the local database won't return
those messages.
This requires another database schema change. With this change messages
at the root of a thread reference themselves in the 'threads' table,
i.e. 'root' contains the value of 'id' for these messages. It makes
selecting all messages in a thread much simpler.
Dynamically generate the CSS style for <pre> elements
for inclusion in the HTML <head> element when messages
are displayed.
This permits a user to change their font-family preference
for plain text messages and see the results immediately.
Obviously any old locally-stored messages that had their
font-family stored with them will continue to display using
that font-family, irrespective of the user's current
preference setting.
The MIME type for the supplied text was always text/html,
so there is no need to pass that as a parameter.
Furthermore, we are relying on it being text/html because
we are wrapping it with HTML code.
Likewise, change/simplify/rename AccessibleWebView.loadDataWithBaseURL().
