OO-1223: directly start the indexer if the cron job is disabled
OO-1211
footer margins
no-jira: translation
OO-1211
replaced dmz bg margins with background-position
Merge with 9294d3653957cc9e3501bfa5b80a8a3ba723312f
non-jira: compile openolat theme after css changes
OO-1211 adding missing back icon
OO-1224: password can be null