OO-531: work on tooltip for link, CSS for tooltip, ajax tree replacement in e-portfolio, z-index in dialog, compressed javascripts, update jquery and jquery ui

OO-531: work on date chooser, callout and dialog, replace last ajax tree, customize CSS from jqeury components to match openolat GUI

OO-534: add update script for postgres, add constraint not null on owner group, fix lower case of item type

OO-449 OO-448 OO-450 fixing configuration issues and dependencies in IM module, adding context help and translations, some GUI optimizations

OO-562: fix the difference between the profile editor and the home page about the visibility of mandatory attributes

no-jira: implements database monitoring for c3p0 without c3p0 dependency in classpath and for the tomcat embedded pool

OO-449: remove all surviving @Transactional, add unit tests in groups to test them, add a missing view in IM, add unit tests to check it...

OO-449: with the changes of cache implementation, refactor the cache to have 1 unique cache and not a cache / course

OO-549: move the error message in the main controller instead of the contact controller to prevent popup in popup

OO-553: improve "StringHelper.transformDisplayNameToFileSystemName" to remove more special characters and all non-ascii characters in general

FXOLAT-208,OO-425: fixed changed location of tree-node-loading class and changed return value open method within FunctionalCourseUtil. Implemented some utility methods.