Fix KNIME URL generated for Local space root

In contrast to `AbstractContentProvider#getRootStore()` which maps to `knime://LOCAL/`,
this one generated `knime://LOCAL`, which makes some code using it now fail when invoked on the local space root,
e.g. "Download" from remote server.

DEVOPS-2739: Update base branch in Jenkinsfile; version bump for 5.3.3

NXT-2735: updateLinkedComponent: Error on failed update check, add re…

…sult details

NXT-2735 (Updating linked component with broken link shows "Everything up to date")

NXT-2879: Remove excess whitespace

NXT-2879 (Drop node on connection with metanode out destination)

NXT-2879: Remove excess whitespace

NXT-2879 (Drop node on connection with metanode out destination)

DEVOPS-2516: use new version of feature branch extension (NO-CI)

DEVOPS-2516: use new version of feature branch extension (NO-CI)

DEVOPS-2561: Update base branch in Jenkinsfile; version bump for 5.3.1

Snapshot test fixed and Row Filter settings updated

DEVOPS-2280: Update base branch in Jenkinsfile; version bump for 5.2.3