Dark mode compatibility

[chicocvenancio]

(not sure if its an extension or argo-cd issue)
If argo-cd is set to use the dark theme, the extension uses white text on white background, as well as well as white text on light gray (rgb(239, 243, 245)) background.

[jcogilvie]

This seems to still be an issue in 0.3.3

[jcogilvie]

Still an issue in 0.3.4

[sergeyshevch]

@jcogilvie Looks like you fixed this. Maybe we can close this issue?

[jcogilvie]

My fix was a cursory one. I think there are a couple places that could use a touchup or a real frontend person to take a look.

Also, I didn't file this issue so I can't alter it (and it didn't get closed with the reference in my PR, oops).