Switch view habits day view to weekly overview

[ManpreetSL]

Story

As a user, I'd like to be able to see a weekly overview of all of my habits. I'd like to be able to change between the weekly and daily views.

ACCs

• Click on a button to toggle the habit timeview between a day view and a weekly view of habits
• When on the daily view, the button will switch to the weekly overview, and vice-versa

Approach

• [x] Add the button to the view habits view, and make it clickable