Flag description - handle long Polish explanations

[KrzysztofMadejski]

We have long flag descriptions in Polish adaptation and they don't fit in popup. How about moving them in expanding panel beneath each flag?

• [ ] turn popup into expandable panel
• [ ] handle html in the descriptions

Link to the presented notice: http://pl.redflags.transparencee.org/notice/2875798

[dzierzy]

fixed