Change Buttons to "Outlined" Style

The table buttons seem a bit... overwhelming with how dark they are. They almost take away from the rest of the table information.

We should change them from a contained mode to a outlined mode.

<Button variant="text">Text</Button>
<Button variant="contained">Contained</Button>
<Button variant="outlined">Outlined</Button> <!--- this one! --->

Right now, we're setting the buttons on these lines: https://gitlab.stanleysolutionsnw.com/idaho4h/4HPhotoUploader/-/blob/tablefun/frontend/src/SettingsTable.js#L40-L41