Show time to Alert date column in the Alerts table.
Add Status Description data when displaying an Alert in a popup.
Use title case for key labels when displaying an Alert in a popup.
Update Alert popup title.

Extract logic to controllers to allow them to step in when deciding if
the row expander should be disabled or not even when the rows are not
disabled themselves (e.g. when they were previously deleted).

Upgrade Angular to 6.1.10 (i.e. latest): upgrade to the HttpClient.
Upgrade Angular Material to 6.4.7 (i.e. latest): upgrade to mat-*
elements, attributes and directives; fix date pickers; fix missing
md-input-containers elements.
Upgrade RxJS to 6.2.2 (i.e. latest). Remove RxJS from devDependencies.
Remove unused codelyzer dependency.
Remove no longer needed md2 dependency.
Add section for the certificate to the user screen.
Add certificate service to support uploading certificates to the server.

Add code to support adding, deleting and editing users in the front-end.
Rename username property to userName.
Add roles and a role service.

Rename folders.
Replace occurrences of Domibus with SMP (SVG logo included).

Rename files as per Angular guidelines.
Remove message filter and error log components.
Exclude the error log component.
Disabl the page helper until we figure out if we need it.

Prefer interfaces to classes where applicable.