UX: Easier copy of share links with auto-selection of link

[TSP]

In version 4.4 you had a dedicated share link easily accessible on posts, which you've now moved within the ellipsis menu. 

When you clicked the share button in the previous version it would open the share dialog and the link text would already be selected so you could quickly copy it, this no longer happens.

So two suggestions: 

• When you click the share link in the ellipsis menu, please auto-select the link text
• Bonus: add a "copy to paste"-button next to the input field