Increase the size of the icons on the buttons on the top bar

[jwrober]

Is your feature request related to a problem? Please describe.
We have some really great icons on the buttons on the top bar. I would like to see them larger to make it more pronounced. This is a sample of what they look like now:

Describe the solution you'd like
Change the icons so they fill most (~80%) of the height of the button. I think the font size does not need to change.

Describe alternatives you've considered
None

Additional context
None