Update onboarding to use new skill selector component

[jmgasper]

@suppermancool - We created a new skill selector component that will be common to both the onboarding and profile apps via this ticket: #685

#697

You can use it simply by:

<InputSkillSelector onChange={(d) => console.log(d)}/>

Note that currently the input does not autosave the changes. this will happen when we have the API in place, but we can add the component now.

The only "output" from the input is the onChange which is triggered any time the user adds/removes a skill.

Let me know if you need anything else added.

[suppermancool]

@jmgasper done in #699

There are a lot of changes because i also merge the code from #697