LDEV-2420 Merging the stylesheets so there is only one defaultHTML.css file, to make it easier to implement themes.Applying the same changes to defaultHTML_rtl.css, as well as some further merging
LDEV-2374: Vote tool does not "freeze" nominations the moment the first Learner reaches the activity. Nomination list can be extended by further inputs from previous tools.
LDEV-2374: Added a parameter to override repository security constraints. Now the Tool Content Handler name can be passed and a ticket will be taken from there, instead of the current tool. Changed the way Pixlr Tool provides output for Data Flow.