OO-450 improve chat layout, imitating skype as best practice example. add link to user visiting card. change small portait image size to 30x30 to match icons available in default theme

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.

OO-347: add CSS class for details of a repository entry and more log by deployment of courses via the REST API