FIX: select-kit refactoring

- improve mini-tag-chooser keyboard behavior
- all multil select now respond to select all and left/right arrows
- improve events handling
- many minor tweaks

test/javascripts/components/multi-select-test.js.es6

@@ -66,6 +66,7 @@ componentTest('interactions', {
     });
 
     this.get('subject').selectRowByValue(3);
+    this.get('subject').expand();
 
     andThen(() => {
       assert.equal(