refactor(desktop): tweak share button to prevent layout shift

[itsrainingmani]

What does this PR do?

• Adds a fallback for the Copy Link IconButton so the share popover doesn't shift when the user clicks on the Publish button.
• Removes the unnecessary left border for the Copy Link icon
• Nullifies the secondary button active scaling for Share button to prevent weird border shifting between Share & Copy Link

How did you verify your code works?

Before

https://github.com/user-attachments/assets/1c5bc0f2-1655-4c80-bd93-c2df6791f397

After

https://github.com/user-attachments/assets/82a91f86-5ef4-4221-aed1-7805670d4251