Random solution view tweaks - ref #1158

* Added link to related discussion
* Changed the exercise name to its capitalized form

More things I noticed but haven't touched yet (I thought it was better to comment here first):
* I haven't touched the capitalization of the language name because in the title it is explicitly capitalized, so I didn't know if it the lowercase in the paragraph was intented, but I think it would look better capitalized everywhere.
* I know it's supposed to be a random solution page, but maybe it'd be better if you couldn't see your own solutions.
* Related to the last one, maybe the counter of implementations should be total - 1 (excluding the user's). That could lead to the only-another-submission situation, which means we would have to create specific text so it's coherent and maybe hide the random link, because otherwise it would always bring you to the same page (unless someone submitted in the meantime).

What do you think?