This patch moves the progress bar slightly up for a better separation
between playback controls and seeking.
The reasoning behind this is that I (and probably others as well) often
interact with this interface in a clumsy, half-asleep state. Due to the
closeness of the progress bar and the play/pause button, I have managed
it several times to accidentally seek instead of pause. That is really
annoying since you then have to manually find the previous playback
position again.
Long term, I would love to see more of the available space being used.
In particular in the player interface. There should be enough free space
available. Especially if you have just one of the progress bars active.
But for now, this is just a quick-fix to improve the current situation.
This patch allows user to not only add a chapter track but also remove
the total track. This means that you can have only the total track or
only the chapter track.
This patch does not allow user to have no track at all. Disabling one
track will automatically enable the other one, if that one is already
disabled.
The reasoning behind this is that for long-ish audio books, users will
not very often look at the overall progress. In fact, I find the
progress bar mostly useful only for quickly seeking to a position when
jumping back a few seconds is not sufficient.
In the seldom occasion that I want the overall progress, I can easily
get it from the book details page.
Instead of handling some items of the player menu as special cases,
adding icons and colors, this patch allows menu items to have icons in
general, allowing for the removal of the special cases.
This also makes it easy to actually use a homogeneous style for all of
the player menu items, letting them all have an icon and aligning them
visually.
