Regenerate initrd after configuring keyboard (bnc#888804)

* Some autotranslated code polishing (in a different commit for easier review)
* Update dependency on yast2 >= 3.1.94 (new messages)
for me it is too nested. I am missing `#Set` in installation or maybe it is on bad level.
In general I expect better split of actions and have it like
```
it "correctly sets all layout variables" do
end
it "call setxkbmap with installed graphical system" do
end
it "do not call setxkbmap without installed graphical system" do
end
```