[vuejs] Add visual highligths to small dialogs

[fdaugan]

Add visual highligths to small dialogs including a reference to a resource.
For sample, deletion confirmation dialogs have references to a resource. This information should be distinguisahble from the other text.

[Terracosmos]

Resolved by #39 (User / Company / Group / GroupMembers confirmations) and #40 (Delegate delete confirmations), both merged on 27 May. The referenced resource name is now wrapped in <strong class="text-error"> via the default slot of LigojConfirmDialog.