Fix an issue with properties dialog crashing.

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.

Add user modes to distinguish between different types of operations
(adding or editing users by the system administrators and users editing
their own details).
Rename the H2JPA test configuration files to follow the same naming
convention.
Add converters transforming between UserRO and DBUser objects.
Fix issue with crt files being filtered by Maven preventing them being
referenced relatively from the target folder.

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).

- update webservices for users, domain service groups
- update UI
- fix war structure to show UI

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.