Stacked setting for checkbox not working as expected

[ionitron-bot]

Short description of the problem:

When using the stacked setting, the label is still located to the right of the checkbox and not the top. Also the font color is black, while the font color of the inputs are grey.

BTW, if you could give use a setting to put the label to the left of the checkbox, that would be great too!

What behavior are you expecting?

Label to located on top of the checkbox and matching fonts to the input controls on the same form.

Steps to reproduce:

1. Insert code below and run

<ion-item>
    <ion-label for="is_active" stacked>Is Active</ion-label>
    <ion-checkbox id="is_active" [(ngModel)]="model.is_active"></ion-checkbox>
</ion-item>

Other information: (e.g. stacktraces, related issues, suggestions how to fix, stackoverflow links, forum links, etc)

Which Ionic Version? 1.x or 2.x
2.0 latest beta

Run ionic info from terminal/cmd prompt: (paste output below)
Cordova CLI: 6.0.0
Gulp version: CLI version 3.9.0
Gulp local: Local version 3.9.1
Ionic Framework Version: 2.0.0-beta.7
Ionic CLI Version: 2.0.0-beta.25
Ionic App Lib Version: 2.0.0-beta.15
OS:
Node Version: v5.1.0