`New branch` button is not reset after closing/reopening issue

Summary

Creating a new branch from an issue is only available when the issue is open. This should be reflected by the New branch button when closing or reopening an issue (without the need for page reload).

Steps to reproduce

• open any issue
• close or reopen it
• state of New branch button stays the same

Expected behavior

Whenever issue state changes, New branch button is updated.