BUG #15126: Fix issues with separated properties/display panels.

* The save/restore buttons weren't being hidden properly.
* The view wasn't saved as a result the display properties weren't being
  shown correctly.

Change-Id: Id5a1eddff034e53b1fe15d85b69de4e105b4c2ca
Merge topic '15126_fix_properties_panel' into next

6c22d883 BUG #15126: Fix issues with separated properties/display panels.
ClientServerCore: add a test for special directories

Currently doesn't do much except exercise the code.

Change-Id: I74f53c66674e4c98cc2c22c306cb17ef0367c5ea
vtkPVFileInformationHelper: fix a typo

Change-Id: I58394e3e80bd038e3b63ff013a3079737f5b2c07
vtkPVFileInformation: update to new APIs

The replaced APIs were deprecated. Unfortunately, 10.6 is still a target
version, so we lose the ability to get the volume names there.

Change-Id: I17f1e0dd4008cd8c50700894373cf10062b32c83
fixup! vtkPVFileInformationHelper: fix a typo

Change-Id: Ia3ef1a73e613f063022813c19bb02824849c5c08
Merge topic 'osx-deprecation-warnings' into next

2f239609 fixup! vtkPVFileInformationHelper: fix a typo
ddb07e56 vtkPVFileInformation: update to new APIs
ad34d12b vtkPVFileInformationHelper: fix a typo
493460f9 ClientServerCore: add a test for special directories