All this crap is very brittle due to circular deps and python handling
them badly. This appears to be fixing some stuff, at the very least.

This is sed, so cleanup of imports (which can now be grouped together)
is not done yet.

now we can edit stuff, save or cancel those modifications, and change
the chose storage easily

This reverts commit b46f0f5e.

Conflicts:
	src/tabs/muclisttab.py

Doing this made the unresized elements refresh in the old subwins,
causing glitches and weirdness. And anyway, the only problematic
element is the TextWin (rebuilding all the lines of a buffer is
expensive), but it already checks if the width changed.

- when list-multi doesn't have selected values at all
- text-multi.options() provided by sleekxmpp is apparently a '\n' separated
  string, and not a list

(also, wrap one forgotten call to curses funcs)

(thanks eijebong)

- 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

Noticeable changes:

- The input "view" is smarter, it always move to a decent position so we can
  see enough text around the cursor.
- The cursor goes at the end of the input when pasting some long text
- The formatting chars (^C and o, b, a, 1, 2, 3 etc) are now visible in the
  input. This makes it a lot easier to know where these special characters
  are, to change them and efficiently edit our text (we just lose a little,
  on the cosmetic side, but who cares)
- The code is actually a lot simpler in the functions to move the cursor,
  insert/delete chars: we do not have to deal with special cases where the
  formatting characters are actually composed of two chars.

fixes #2183

mathieui authored Dec 28, 2011 and louiz’ committed Jan 26, 2012

Vertical tab list, text not erased from previous tab

Vertical tab list, text not erased from previous tab

[teisenbe] Make the data forms more usable (highlight of the selected row) + theme colors instead of hardcoded ones