base: dropdown menu and mobile UI fix

* Fixes dropdown menu. (addresses #1994)

Signed-off-by: Adrian Baran <adrian.pawel.baran@cern.ch>
deposit: s/deposition/deposit/

* Changes the word 'deposition' to 'deposit'. (closes #1915)

Signed-off-by: Adrian Pawel Baran <adrian.pawel.baran@cern.ch>