1st part
fixes for modelMixin
fix scrolling
update
fix layout after refactoring
Fix bug in ModelMixin
fix Model Mixin
complete refactoring
Merge branch 'refactoring'

* refactoring:
  complete refactoring
  fix Model Mixin
  Fix bug in ModelMixin
  fix layout after refactoring
  update
  fix scrolling
  fixes for modelMixin
  1st part
Merge branch 'master' of github.com:openconf/jschat

* 'master' of github.com:openconf/jschat:
  TODO: check the message was saved in DB