Click nesting issues

**Vuestic-ui version:** 1.9.7

I went through checkbox stories and noticed a couple of issues. That might be not an issue even, but I'll share regardless.

*  Clicking on VaCheckbox container doesn't change its value. You have to go to first child.
	```
	el.children[0].click()
	```
* For VaSwitch
    ```
	el.children[0].children[0].children[0].click()
	```