Support directly linking PlanQK Algorithms in QC-Atlas

[mhinkie]

When viewing Algorithms from PlanQK in the QC-Atlas UI, they are assigned an URL such as:
http://127.0.0.1/#/algorithms/9d445a80-6707-4a42-9689-4119c47b7120

Although these URLs are visible in the address bar when viewing the algorithm. They can not be opened directly (i.e., by a Link from another Website). To enable linking patterns to algorithms from PlanQK when viewed in QC-Atlas, this direct navigation needs to be supported.

Current situation
Directly opening links as above produces a blank page and the error notification "Error! Algorithm could not be retrieved".
This is because:

1. The logged-in user is not remembered across Tabs/Windows.
2. Even if the login-status is kept, it results in a new login, which reloads the page.
3. When an algorithm is directly linked, QC-Atlas assumes it comes from its own API and does not check PlanQK for this algorithm.

Tasks

1. Extend keycloak initialization to enable single sign-on and loading user profiles at startup (src/app/util/keycloak-init.ts
2. Fix page-reload logic in src/app/components/navigation/navigation.component.ts
3. Change algorithm-view init logic to also check PlanQK if applicable. (src/app/components/algorithms/algorithm-view/algorithm-view.component.ts)

[salmma]

#242 updates Angular to support a newer keycloak version. This PR has to be considered such that the logout from the PlanQK platform works again properly.

[mhinkie]

Fixed in PR #245