transfers

(#1796)

remove many call to dialog.run() function. Some are still here, but they happend only when the user do an action (close a chat window, change status, ...). So UI is not blocked when we receive a groupchat invitation or an error message.

fix logic in handle_event_msg so messages from lower resource doesn't behaves incorrectly. Fixes #1785

unsensitive most menu items in context menus of contact / group / transport / account when account is offline and prevent renaming of contact / group. See #1754

if we have status message for contact that signs in/out and we have such notifications, include the status message information in those windows

it unwise to include the "inconsistent use of tabs and spaces in indentation" warning.
Filtering stderr works, but may also filter out useful info.

* Add option 'dont_ack_s10n' to prevent the infinite loop with jabberd2 subscription acknowledgements.