when windows already exist present() them. cancel button and not close in account_modification_window

emoticons and status messages are now a group of ption in the common config file (thx tab for your code)

 * from xx import yy -> import xx
 * yy() -> xx.yy()

plugin.config -> gajim.config in config.py

currently gajim cannot be accessed from every where, even with global gajim :(