method already in the same file. Fixes #4273.

 * draw_completely: draw contact, mood, activity... of a given jid
 * For metacontacts over several accounts, not all avatars were shown correctly when the second accounts connected

[kalyan] don't show error when we press enter in chat while offline if enter is just for a line break. Fixes #3852

Improve Windows Installer: don't allow to uninstall if Gajim is running, Don't allow to run several Gajim installer, and force to remove a previous Gajim installation before installing the new one. Fixes #4193

-Specify separation for 'gc_nicknames_colors' option.