Adjustable font

[therealkeng]

Is your feature request related to a problem? Please describe.
I have a tablet display and, unless I'm close enough to the tablet, it is a bit hard to see.

Describe the solution you'd like
An option to increase (or reduce) the font size for the various elements.

Describe alternatives you've considered
N/A

Additional context
This project is actually much better than the simple clock I was using that didn't have the ability to change to AM/PM format. Thanks for this card.

[pkissling]

duplicates #362