v0.40.1: Lint and folding bugfixes

A small bugfix release for 0.40

Bugfixes

• Fixed markdown and yaml formatting warnings failing to appear
• Fixed collapsing markdown headings not working, or not collapsing the right content in some circumstances
• Slightly improved clicking outline headers staying selected when the document scrolls to the new position. This will not be 100% correct but may be improved in the future
• Fixed brand new documents using the wrong initial formatting before navigating