this lets users switch between all compatible prepositions and cases
for the currently selected combination, which makes the UI a bit
easier to explore.
Спасибо /u/wrest3!
Change-Id: Iaf4e90403c90beb5d75acfa73fd0f5f2cb5035c5
Reviewed-on: https://cl.tvl.fyi/c/depot/+/5996
Reviewed-by: tazjin <tazjin@tvl.su>
Tested-by: BuildkiteCI