File and clip reader themes (text color, background color)

[giokve]

It would be nice to have different themes to choose from, like in Moon Reader (Android). For example, yellow text on black background, light gray text on dark grey background, and so on. No really sure how the popup bubble could be handled though, since the tone colors some people use would probably get in the mix.

E.g.

 

[mikelove]

We already offer white, sepia, and black - I'm not sure if there are enough other themes people would like to justify making it fully customizable, though I suppose it wouldn't be too complicated; would only really be a challenge for PDFs and we could always skip those.