Simplify boxes' design for Dashboard page

[slemeur]

At this moment we are having the following design for the boxes displayed on the Dashboard page.

Since we are going to update the design of the list + the design of the form component, the header at the top of those boxes is not aligned anymore and needs to be updated.

Proposal:

• Remove the blue shape
• Replace the color of the text+icon in the headers to the dark blue we are using for page's title.

[JamesDrummond]

@slemeur Should this have kind/enhancement or kind/task label?