network: equal spacing between list sections

There should be an equal amount of vertical space between each list
section.

Fixes #550
Status Job ID Name Coverage
  Build
passed #326124
build

00:02:14

 
  Test
passed #326126
asan

00:01:19

passed #326125
test

00:01:21

 
  Manual
manual #326131
allowed to fail manual
armv8
manual #326127
allowed to fail manual
flatpak
manual #326130
allowed to fail manual
msan
manual #326132
allowed to fail manual
ppc64le
manual #326128
allowed to fail manual
tsan
manual #326129
allowed to fail manual
ubsan
 
  Review
manual #326133
allowed to fail manual
review
manual #326134
allowed to fail manual
stop_review