[Cura 3.0.3: No build plate grid for Ubuntu, tiny fonts won't enlarge]

Hi. Two problems that have appeared with 3.0.3 that were not present in the previous version, running Ubuntu 16.04. First, the build plate grid has vanished. No grid at all! This makes positioning somewhat more problematic. Second, the gnome commands I used to increase the normally very small fonts of the UI no longer work with this version. This is a problem when your vision isn't 20/20 anymore! Thanks.

[Very small Cura 2.5 fonts compared with 2.4]

The Title says it all. Cura 2.5 looks like it has some excellent new features, but the display font is much smaller than 2.4, to the point of unusability by persons with less than perfect vision. How can it be enlarged? Thanks.