No default Start time and Expiry time display on 'Access Policies' dialog

[v-xuanzh]

Storage Explorer Version: 1.6.2_20190123.3
Platform/OS Version: Windows x64/Linux Ubuntu 16.04/MacOS High Sierra
Architecture: ia32
Commit:e412c857
Regression From: Previous release 1.6.2

Steps to Reproduce:

1. Choose one non adls gen2 account ->Right click one blob container then select 'Manage Access Policies...'.
2. Click 'Add' -> Check the Start time and Expiry time for the added accees policy -> Save.
3. Right click the same blob container then select 'Get Shared Access Signature...' -> Select the added ploicy on the dropdown list -> Check the Start time and Expiry time on the SAS dialog.

Expected Experience:

Step2: Show the default Start time and Expiry time on the 'Access Policies' dialog.
Step3: SAS dialog shows the same Start time and Expiry time with default.

Actual Experience:

Step2: There is no default Start time and Expiry time.

Step4: Only shows the Expiry time on SAS dialog.

[craxal]

By design. Access policies do not need expiry or start times. This was done to fix #764.

[v-xuanzh]

@craxal ,
Also, the default expiry time with the current time shows on SAS dialog when selecting the set access policy(no start time and expiry time). Is it by design?

[craxal]

No, but we're going to revert changes made here due to too many regressions. See #1092, #1093.