Created attachment 183249 [details] [review]
popupMenu: Restyle the slider to use a color for the 'active' area

In the mockups the slider does not have an uniform color but uses
one color (shade of blue) to indicate the current value and one
to indicate "the rest" (shade of grey).

So adjust the slider to look like that to be closer to the look
in the mockups and thus to the design.

Review of attachment 183249 [details] [review]:

Assuming that the color was chosen by the designers, this looks good to commit to me. The only problem would be UI freeze.

Attachment 183249 [details] pushed as 3466829 - popupMenu: Restyle the slider to use a color for the 'active' area