feature(comapny): use timeline_view for company

display a timeline with all members of the timeline
feature(timeline_view): Use tile_view for header

Add label_group + label_content for navigation
Now timeline_view is specific for:
* navigation_root (content = watchers)
* group (content = group content)
* member (content = where creator is Member)
* Company (content = members)
fixes(i18n,members): broken msgids + missing features on members

* remove dynamic content on i18n: use i18n:name
* add back validation of member email
* add back modfiy company of member