Negotiate contracts in GitLaw, plus clearer eSign status

✨ New Features

• You can now negotiate contracts in GitLaw. When the other side sends back their copy, or you add their Word file, their edits show as tracked changes and you merge the ones you want. Where you both changed a clause, you choose which wording to keep.

🔧 Improvements

• When you open a PDF you've sent for signature, you now see its signing status and can cancel the request or go back to the original document.
• The agent's Track changes setting now sits next to the message box and is on by default, so you can review every edit the agent makes before you accept it.
• When you upload a contract for review, the agent's findings now appear as comments in the document, so you can read each one in context.
• You can now open a file in a new tab from the Files page.
• Wide tables in your documents now scroll sideways on screen and fit the page when you print.

🐞 Fixes

• When you stop the agent, it now stays stopped.
• Your organization's name and jurisdiction now update straight away when you change them in Settings.
• Email addresses in comments are no longer mistaken for a mention of the agent.