common: Change language chooser layout to match design

Have the language name on the left and the country on the right dimmed as per:
https://wiki.gnome.org/Design/SystemSettings/RegionAndLanguage
11 jobs for <span class="ref-name">common-language-chooser-design2</span> in 4 minutes and 49 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  Build
passed #105702
build

00:02:11

 
  Test
passed #105704
asan

00:01:57

passed #105703
test

00:00:40

 
  Manual
manual #105709
allowed to fail manual
armv8
manual #105705
allowed to fail manual
flatpak
manual #105708
allowed to fail manual
msan
manual #105710
allowed to fail manual
ppc64le
manual #105706
allowed to fail manual
tsan
manual #105707
allowed to fail manual
ubsan
 
  Review
manual #105711
allowed to fail manual
review
manual #105712
allowed to fail manual
stop_review