Missing cursor theme on snap installation for Fedora 30 and OpenSUSE Tumbleweed

[rhroberts]

The snap installs properly on Fedora 30 workstation and OpenSUSE Tumbleweed, but running the snap produces this following error, preventing app execution:

Gdk-Message: 16:35:17.073: Unable to load fleur from the cursor theme
Gdk-Message: 16:35:17.093: Unable to load fleur from the cursor theme
Traceback (most recent call last):
File "/snap/kfit/24/lib/python3.6/site-packages/matplotlib/backends/backend_gtk3.py", line 45, in
cursors.MOVE : Gdk.Cursor.new(Gdk.CursorType.FLEUR),
TypeError: constructor returned NULL

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/snap/kfit/24/share/kfit/kfit.py", line 7, in
from matplotlib.backends.backend_gtk3cairo import (
File "/snap/kfit/24/lib/python3.6/site-packages/matplotlib/backends/backend_gtk3cairo.py", line 1, in
from . import backend_cairo, backend_gtk3
File "/snap/kfit/24/lib/python3.6/site-packages/matplotlib/backends/backend_gtk3.py", line 54, in
raise ImportError(exc)
ImportError: constructor returned NULL