cursor model: look for cursors in correct place

Authored by zx2c4 on Sep 13 2016, 2:13 AM.

Description

cursor model: look for cursors in correct place

plasma-desktop's cursor theme kcm does the right thing, by consulting
the libXcursor library for the right search paths. Unfortunately, the
kcm here does a pretty butchered job of it. So, we copy, more or less,
the same algorithm used by plasma-desktop. Now there's parity in cursor
selection.