[Accessibility][Name, Role, Value - Create Node]: Role of Paste button is not correct in add node section.

[ashish315]

User Experience
Users who rely on AT will might get confused if the controls available in the same menu item have different roles.

Test Environment
Browser: Microsoft Edge Canary Version: 82.0.425.0 (Official build)
OS build: 2004 (19564.1005)
Screen Reader: Narrator
URL: Bot Framework Composer
Prerequisite Here

Repro Steps:

1. Open the above mentioned URL in EDGE and set the zoom at 400%.
2. Select 'Design Flow' from left navigation.
3. Now, navigate to the flow chart.
4. Navigate to "+" button and activate it.
5. Navigate to 'Paste' available in the list and observe the issue.

Actual:
The narrator narrate the role of 'Paste' as button where as all the other option's are having role of menu item. The narrator narrates 2nd element i.e. 'Send a respond' as menu item 2 of 8.

Expected:
The role of 'Paste' should be same as other's. The role of 'Paste' should be menu item and narrator should narrates as 'Paste' menu item 1 of 8.

MAS Impacted: MAS4.1.2

Attachment:
MAS4.1.2_Role of paste button.zip

[corinagum]

.png uploaded for ease of access, but note that there is also a video in the .zip

[cwhitten]

addressed in #2126

[ashish315]

As cross-checked the issue is fixed in master version so we are good to close the issue.