This is a follow-up to the issue
ZOOKEEPER-3943 and the discussion on https://github.com/apache/zookeeper/pull/1551. PR 1551 fixes the location issue for all of the various Icons used by the UI, but does not address a similar issue with the defaultNodeViewers.cfg and defaultConnectionSettings.cfg files (as pointed out in the PR comments).
As a result, if one builds a "Fat JAR" of the Zookeeper Inspector application and then moves it to a different directory, this error appears when inspecting a node at runtime:
WARN [main] (ZooInspectorManagerImpl.java:851) - List of default node viewers is empty"
And the node viewer window cannot populate correctly.