Convert action buttons for table line items to dropdown.

Problem

In an effort to polish and unify the UI, we need to update these tables. This issue is to merge the Edit and Delete buttons into a single dropdown button.

admin /overview / Groups	admin / overview / Projects

Proposal

🎨 Figma work file

Convert the Edit and Delete buttons to a single tertiary-icon:ellipsis button, and add the edit/delete options to the drop down.

Groups	Projects
dropdown	dropdown