Grid dots from 0.92.x have become grid 'crosses'
#### Steps to reproduce:
- open Inkscape
- in document properties, enable a grid with dots instead of lines
#### What happened?
- get crosses:

#### What should have happened?
- get smaller crosses that look more like dots (Inkscape 0.92.3 (2405546, 2018-03-11)):

#### Inkscape Version and Operating System:
- Inkscape Version: 1.0alpha (50f63d05be, 2019-03-10)
- Operating System: Linux Mint 19.1
issue