Fix search entries coloring

Search entries coloring is broken, maybe for a while.
I suspect this is due to the deprecation of gtk_widget_modify_*(), because this fix simply replaces them by newer versions.
They are also deprecated since gtk-3.16, but this fix works with only minimal changes, so maybe it's sufficient for the time being.

added 1 commit

• 169b0d83 - Fix search entries coloring

Compare with previous version

Seems ok. Should probably depend on #49 (closed).

Isn't this a duplicate of #36 (closed)?

Oops! Yes it is, sorry!
That said, the two approaches are slightly different.

Despite the fact that the one in this MR allows to choose background and text colors, by getting as close as possible to the current code, I would rather prefer the other, even if the choice is not mine!

Closing in favour of #36 (closed), which removes the existing hardcoded colours.

closed