Added collapse/Expanded highlighted groups.
Merge branch 'mon2htm' of github.com:bcrosnier/ck-core into mon2htm
Merge remote-tracking branch 'upstream/develop' into mon2htm
Added entries to collapse children/parent group.
Use line range right-click selection instead of highlighting
Added a header menu for log pages.
Fixed Chrome visual bug.
App fixes (...)

- Fixed NullRefException when SystemActivityMonitor directory does not exist in path.
- Now showing browser context menu when shift is pressed.
Selection using range instead of line array.
Open/close groups menu entries now act recursively.
3.0.12 release.