- avoid doing stringprep on every item, avoid at least one full copy
- add the number of items to the infowin

as it is unused code anyway.

Although the logic stays the same, and everything is put back together
in a single class.

- /bookmark{_local,} * now keeps the order of the tabs, and puts the
  currently non-opened tabs at the end of the list.
- also fix a bug in remote bookmark saving

(thanks eijebong)

TODO: check if this method of setting activity isn’t a bit heavy.

remove xhtml prior to performing stuff

Now everything in the logs is in UTC time, and is converted when read

(also, actually return the logs after loading them instead of not doing
anything)

only happens with buggy servers (hello ejabberd)

Add color to the info messages
Unlock the tab when the locked resource goes offline

…………………………

(why wasn’t that already here?)

config.get('option', 'value').lower() == 'value' is just ugly and
stupid, especially for bool.

One if in basetabs:556 was also missing a comparison, leading to True
whenever the option was set.

Allow opening a static conversation even when a (dynamic) conversation with the contact is already open

- No idea why subclasses of ConversationTab were working before
    (info_header was overriden with None in __init__)
- Or why the date parsing worked (“Exeception”)
- Some more reformatting with pylint indications
- Document each module in the tabs module