fix(toggle): add styling for toggle when placed left

BREAKING CHANGES: renamed Sass variables in toggle, checkbox, and
radio. Changed `media` in `component-mode-media-padding` (for example)
to `item-left`.

references #5925

ionic/components/toggle/test/basic/main.html

@@ -7,6 +7,16 @@
 
     <ion-list>
 
+      <ion-item>
+        Left side default icon, really long text that should ellipsis ellipsis ellipsis
+        <ion-icon name="information-circle" item-left></ion-icon>
+      </ion-item>
+
+      <ion-item>
+        <ion-label>Apple</ion-label>
+        <ion-toggle item-left value="apple"></ion-toggle>
+      </ion-item>
+
       <ion-item>
         <ion-label>Apple, ngControl</ion-label>
         <ion-toggle ngControl="appleCtrl"></ion-toggle>