group/role-editing: basic modal functionality (code for #2)
group/role-editing: finished modal functionality
use modal to edit groups and roles of users
don't use up 3 lines for buttons in dashboard users datatable
german locale for group/role-editing
show the users name in group/role-editing-modal
update table when updating groups/roles in dashboard
group/role-editor: small edits in german locale
Merge branch 'dashboard-group-roles-editing'