Extract Contest::used_problem_codes
Translate 'console_graphs' page. Connect labels to checkboxes.
Return 404 instead of custom error when accessing unavailable problem text
Extract compiler_params.tti
Translate 'compilers_edit' and 'compilers_new' pages.
Extract CATS::Compilers
Translate 'Syntax' column header on compilers page
Merge compilers_edit and compilers_new pages
Move 'authors' page to documentation with minor updates
Extract CATS::Keywords
Disallow access to documentation templates
Merge keywords_edit and keywords_new pages
Translate 'keywords' and 'keywords_edit' pages.
Translate 'Incorrect keyword parameters' error
Remove spaces at eol