add contest_request
add dropdown
fix index page
fix contest request form
add popover
some fixes
Merge branch 'feature/anketa' into develop

* feature/anketa:
  some fixes
  add popover
  fix contest request form
  fix index page
  add dropdown
  add contest_request
add hints
edit navbar at adminka
some fixes in adminka
add lead to hint
add lead view
make subject uniquness
add hints show
add hint viewer
link viewer
Merge branch 'feature/add_hints' into develop

* feature/add_hints:
  link viewer
  add hint viewer
  add hints show
  make subject uniquness
  add lead view
  add lead to hint
  some fixes in adminka
  edit navbar at adminka
  add hints