Bug 950005

Description of problem:
evolution doesn't download some messages from imap, showing their bodies as zero size (and with zero size attachment of text/html)

Version-Release number of selected component (if applicable):
evolution-2.28.3-30.el6.x86_64

How reproducible:
frequently

Steps to Reproduce:
1. check ""Check for new messages in all folders" and "Automatically synchronize remote mail locally" in "Email account" -> "Receiving Options"
2. switch evo to offline mode
3. send (add) tens to hundreds of various messages (plaintext/html, with/without attachments, conversation roots/replies) to some folder
4. wait till evo finishes "checking for new mail" and "synchronizing mail locally for offline use"
5. put evo back offline
6. browse the messages
  
Actual results:
* some messages (up to half in my experience) is "downloaded" with just newline in message body and zero-length html body (aka only headers are downloaded locally but evo pretends that message bodies and attachments are downloaded as well)
* even after evo is put back online, it doesn't redownload the message on browsing the messages in the same folder
* the messages are downloaded again when user selects different message, navigates to other folder, navigates back and selects the message again

Expected results:
* all messages are downloaded fully (preferably in order of: displayed parts of currently selected message, all headers, all preferred bodies, all attachments, all alternative bodies)
* if some (part of the) message is not downloaded, evo marks it as such and tries to re-download it on first occasion (after first synchronization finishes)

Additional info:
This is really annoying when one wants to read bunch of emails while travelling with bad or no network connection.