Describe does nothing on a component that is only present on the cluster

[adietish]

Steps:

1. EXEC: make sure that you're connected to the Red Hat Developer Sandbox
2. ASSERT: sandbox offers a modelmesh-controller out of the box (not created locally), it is therefore annotated with no local context in the resource tree
3. EXEC: pick "Describe" in the context menu for the modelmesh-controller

Result: Nothing happens.

Excepected Result: As a user I'd want to know why nothing is executed. In the code I see that describe would do nothing

OdoCli:

    public void describeComponent(String project, String context, String component) throws IOException {
        if (context != null) {