SONAR-1922 Improve UI for profile changelog

SONAR-1922 Improve UI for profile changelog

* Removed useless version column from Quality Profiles page.

* To improve readability - version of profile displayed in a dedicated
  column on Changelog page, otherwise it can be difficult to determine
  version associated to a row.

* Allowed to select both versions to compare.

* CSS attribute "word-wrap" was set to "break-word" to decrease width of
  table, when parameter value too huge. Tested in Chromimum 12.0.742.68
  and in Firefox 3.6.17.

* Version of profile was added to widget.

* Save and show username instead of login.