Make unified button for sharing and linking

[yangwao]

Let's deliver same style to the sharing button as we have already on other buttons, with clean rectangle borders

Needs replacement on

• profile https://nft.kodadot.xyz/rmrk/u/EJMCExEPNyuq6EofbvwD2ErZKwuZCJVTFhiDcDwuW12c187
• collection https://nft.kodadot.xyz/rmrk/collection/4c4a2f66cde689450b-CHGL100
  Right now
  

The desired look for button, recycle one from actions?

[prachi00]

@yangwao I'll pick this up

[yangwao]

@prachi00 I've assigned you!:)