Refs #367: apply minimalist style for public tables (non-admin pages)

apply minimalist styles to Surse table,
apply minimalist style to Licențe table,
fix bug on Polar Unelte table: info icon not visible,
style Licențe table on Polar too,
style Surse table on Polar too,
style Topul voluntarilor table,
for Topul voluntarilor tables, add rules after every 3 entries,
minimalist style for wikiArticle tables.