OO-2844: add option to show the full text search to guest users, update check access of the different indexers, remove the context aware full text search in forum if the option is disabled

OO-2866: check if the test is ended before resuming and some small chaanges to handle the case without NPE

OO-2836: update to selenium 3.4, migrate the tests to pass with chrome, add css class mostly in wizards, remove some fieldset in fieldset, add some label around checkbox

OO-2636: only show the useful segments of the lectures administration in a course, if disable only show the configuration, if enable all segments; and update the toolbar aafter configuration changes

OO-2830 fix several bugs in members display code, bring back configurable user properties context, also for avatar view