Add the activity log for 'Clear Queue' action

[v-xianya]

Storage Explorer Version: 1.11.2
Build: 20200104.4
Branch: master
Platform/OS: Windows 10/ CentOS 7.6.1810 (Core)/ MacOS High Sierra
Architecture: ia32/x64
Regression From: Not a regression

Steps to reproduce:

1. Expand one storage account -> Queues.
2. Create a new queue -> Add some messages -> Clear the queue.
3. Check whether there log shows or not in Activities.

Expect Experience:
Show log in Activities.

Actual Experience:
No log shows in Activities.

More Info:

1. This issue also reproduces for 'Dequeue Message'.