Only encrypt when the receiver is trusted. You have to sign its key or it has to be signed by someone you trust. Fixes #109

Make checkbox insensitive when GPG is disabled on an account (or no passphrase given).

Auto assign trusted keys on received presence. Deny encryption on missmatch of assigned key and signing key. Fixes #3376

Do not disable encrypted when receiving an unencrypted message. Print whether a received message was encrypted or not.

TODO: Remove togglebutton, its useless now

ability to block / unblock a transport. Remove log on / log off (it's the same as send_custom_status)

Refactor the way we decide whether GPG is usable or not: Ability to change keys when no valid passphrase could be entered.
See #1210. Workaround for unavailable keys.

Remove useless except block: import of GnuPGInterface is the same on Debian and non Debian systems.

Do not fail when no key is selected.

hopefully... :p Please test

Since KeyboardInterrupt is "common" then catch the exception, print to stderr, and exit.  No traceback, which says "error" to me...

don't propose to add certificate to cacerts.pem file if it's useless, and don't add it if it is already in. fixes #720

For example, if the roster is hidden in single UI mode and a new chat arrived the roster would unhide.

Merged revisions 9143,9145-9155,9157-9162,9164-9169,9171-9177 via svnmerge from
svn://88.191.11.156/gajim/branches/one_window

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  r9145 | nicfit | 2007-12-13 21:49:09 -0700 (Thu, 13 Dec 2007) | 2 lines

  Implemented the original Nikos patch with an HPaned instead of a HBox and only do this mode when one_message_window == 'always'
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  r9152 | nicfit | 2007-12-15 13:33:56 -0700 (Sat, 15 Dec 2007) | 2 lines

  Added config and GUI for one_message_window_with_roster
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  r9153 | nicfit | 2007-12-15 13:41:46 -0700 (Sat, 15 Dec 2007) | 2 lines

  Use one_message_window_with_roster and some whitespace cleanup
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  r9154 | nicfit | 2007-12-15 14:04:49 -0700 (Sat, 15 Dec 2007) | 2 lines

  Scratch the chckbox for with roster mode, use one_message_window opt and combo
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  r9155 | nicfit | 2007-12-15 17:01:13 -0700 (Sat, 15 Dec 2007) | 2 lines

  MessageWindowMgr knows about ONE_MESSAGE_WINDOW_ALWAYS_WITH_ROSTER and MessageWindow can reparent itself rather then the roster having to do so.
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  r9157 | nicfit | 2007-12-15 17:47:20 -0700 (Sat, 15 Dec 2007) | 2 lines

  Resizing fixes and make the roster window shrink when last tab is removed
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  r9158 | nicfit | 2007-12-15 19:15:11 -0700 (Sat, 15 Dec 2007) | 2 lines

  Added "Show roster" (CTRL+R) to view menu when using always_with_roster to quickly hide/show the roster.
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  r9159 | nicfit | 2007-12-15 19:49:30 -0700 (Sat, 15 Dec 2007) | 2 lines

  Handle window title setting in always_with_roster mode.
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  r9160 | nicfit | 2007-12-15 20:13:57 -0700 (Sat, 15 Dec 2007) | 2 lines

  Removed FIXME
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  r9167 | nicfit | 2007-12-17 18:40:59 -0700 (Mon, 17 Dec 2007) | 2 lines

  When roster is hidden, show it when the number of MessageWindow controls == 0
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  r9168 | nicfit | 2007-12-17 19:07:49 -0700 (Mon, 17 Dec 2007) | 2 lines

  Disable hiding roster when there are no message controls open
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  r9169 | nicfit | 2007-12-17 20:41:11 -0700 (Mon, 17 Dec 2007) | 2 lines

  Bunch of saved size bugs fixed
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