In sencha touch documentation and forums, I could not find the list of names of 96 pictos font icons that I should pass in icon() mixin in order to import an icon. Like in following example:
@include icon('search');
Full list of all those token you can find out, if you open touch distribution file touch/resources/themes/stylesheets/sencha-touch/base/mixins/_Class.scss, line 393 (last distro), function @function icon-character-for-name($name)
Here is a reference to the pictos site: http://pictos.cc/classic/font