[(Dark mode) Bug] The "To" text is black and hard to see

[sabogalc]

I'm not sure how it is on macOS, but I made a mockup based on how it looks on iOS (I copied the color from the "Search" text)

[EricRabil]

Ewwww to both how it looks right now and that horizontal scrollbar along the bottom! Thanks, I'll fix this in the next flurry of commits.

[sabogalc]

Similar to how I said in issue #43, this can be fixed by changing line 16 of _transcript-toolbar.scss from rgba(0, 0, 0, 0.6) to rgba(157, 157, 157, 1)

[sabogalc]

I tried fixing this but unfortunately my changes didn't work

[sabogalc]

#44