fix library styles in 2.2

[ronso0]

some labels and button borders in DlgRecording, DlgAutoDJ and DlgAnalysis were screwed up or offset.

Deere & Shade: adopt beatsize spinbox style for AutoDJ transition (I have the strange feeling I fixed this several times already...)
LateNight: add style for disabled buttons
Tango: make the scrollbars a bit wider

[Be-ing]

LGTM with GNOME. Thanks for the polishing. :) It would be helpful to get a few more testers with different setups.

[ronso0]

LGTM with GNOME. Thanks for the polishing. :) It would be helpful to get a few more testers with different setups.

Yup, it would be nice to have it confirmed it looks as above in Win/OSX as well!

[benis]

Looking good on macOS 10.13.6

[Be-ing]

Thanks. Could we get someone to test on Windows? @JosepMaJAZ?

[JosepMaJAZ]

Looking good here (heh.. I haven't used much the AutoDJ recently so I wasn't even aware of that... maybe I saw it but I didn't pay attention)

[radusuciu]

I think unrelated to changes here but saw this

[ronso0]

I think unrelated to changes here but saw this

Yes, unrelated. Your screenshot indicates there's another font used instead of Open Sans (which is included in Mixxx). I'll have a look.

[ronso0]

Should look like below. Note different letter spacing, also how C and S look like.

Which version and OS are you using?

[radusuciu]

Windows 10, with the build artifact from this PR. I can install from stable and beta to see if issue persists.