fixes navigation in filter box
Merge branch 'master' of https://github.com/johnwun/angular-multi-select

* 'master' of https://github.com/johnwun/angular-multi-select:
  fixes navigation in filter box
Merge branch 'master' of https://github.com/johnwun/angular-multi-select

* 'master' of https://github.com/johnwun/angular-multi-select:
  added debounce to input model
  modified button label to show total selected when max label is 0
Igors change to add selected buttons