v5.3.2

What's Changed

• Remove obsolete browser specific flexbox properties by @jcoyne in #3606
• Change page nesting level by dragging directly left or right by @taylor-steve in #3720
• Don't load images in the javascript feature spec browser by @corylown in #3717
• Import bootstrap as a namespace so Tab resolves in every build by @corylown in #3724

Full Changelog: v5.3.1...v5.3.2