[Refresh] Add refresh button to inspector

Adds the refresh button to the Inspector panel, nasa/mct#138

Inspector does not have an appropriate common interface for view switching with MCTHousingViewManifestation (used when the relevant view is in the center pane), so explicit type checking is performed to distinguish the two action contexts.

Wrote or re-wrote unit tests (Y/N): Y
Ran entire suite of unit tests successfully (Y/N): Y
Verified bug fix with the described replication steps or verified the implementation meets the requirement cited (Y/N): Y
Code coverage requirements satisfied (new code=80%, changed code=at least as high as existing) (Y/N): Y
Code review date and attendees: Code review by pull request
Describe potential impact on other areas of the code: Center pane views
Describe any test prerequisites for this fix (e.g., restart the database): N/A
For bugs marked "Regression - Yes", describe the cause of the regression: N/A
Did you modify any pom.xml file? If yes, did you thoroughly document your changes and reasons? N