Enhance UX of contact sidebar

First off, I <3 Chatwoot :)

• remove the edit, merge and delete buttons
-- allow user to edit inline, the edit button is just not very user friendly when copy pasting data out of the actual conversation into the contact
-- display merge button next to merge key if merge key is a match
-- delete is sufficient within contacts list
• move conversation actions into conversation header. it already displays the current assigned user, it would be more intuitive to make that a drop-down to select any user and team
• move Contact Attributes right below Contact Info
• setting to display all contact attributes by default in the sidebar
-- allow to change display order of contact attributes by dragging/dropping attributes in settings
-- remove delete button of contact attributes in sidebar
-- if possible, allow to display contact attributes like default contact info using just icon and value with mouseover alt text