Framing in "create event" window broken

[kruemelm0nsta]

Header in the "create event" window should be in a single line

Depending on the language text doesn't fit in header, this is the case for German and Greek

[kruemelm0nsta]

same on "event details"

in German, Greek, Spanish, French, Gallego, Italian, Polish, Slovanian, Swedish

[marwyg]

I fixed the wizard steps with #644 I think, but I cannot reproduce the issue with the event details tabs.