Item12481: working towards a final release ...

- improved layout of user profiles
- fixed view templates for groups when no topic exists for them
- improved grouping of "more" actions in dropdown menu
- depending on CopyContrib 2.0 now
- color improvements of default theme
- fixed foswikiNoBullets style inside a grid
- improved design of scroll-to-top button
- simplifying html element to be more html5-ish