Support to check the set permissions for attached services on 'Actions/Properties' Panel

Storage Explorer Version: 1.5.0
Platform/OS Version: Windows 10/MacOS High Sierra/ Linux Ubuntu 16.04
Architecture: ia32/x64
Build Number: 20180808.1
Commit: 93925d3c
Regression From: Not a regression

Steps to Reproduce:

1. Create a SAS URL for a blob container with 'Read' and 'List' permissions.
   Display name: test1
   SAS URL: https://test07180.blob.core.windows.net/test1?st=2018-08-09T08%3A58%3A03Z&se=2018-08-10T08%3A58%3A03Z&sp=rl&sv=2018-03-28&sr=c&sig=DRb1kSp5KRja17R1cW9v8m5hKOI7JmiQ9x%2BIsJzisp4%3D
2. Expand the Local & Attached > Storage Accounts > (SAS-Attached Services) > Blob Containers nodes and select the attached blob container.
3. Check the properties on 'Actions/Properties' Panel.

Expected Experience:

Shows 'Permission' property on 'Actions/Properties' Panel so that we can check the current set permission for the attached service.

Actual Experience:

No 'Permission' property displays.

Start at the Actions/Properties panel for a SAS-attached blob container and reproduce the behavior with the Read/List SAS URL described in the issue. Done means the panel displays the current Permission property for the attached service.