Additional improvements and fixes

Fix and enhance next/prev message jumping

Sort messages so that errors show up before warnings (fixes #199).
Fix next/prev when show_errors_inline is false (fixes #206).
Fix on-save checking when show_errors_inline is false.
Scroll the build output panel on next/prev message.
Next/prev now cycles through test errors.
Fix Next/Prev overriding find-in-files next/prev (fixes #209).

Add Escape keybinding to dismiss inline messages. fixes #200

highlight where in struct defn properly fixes #190

match whole operators to support ligatures fixes #216

Additional Snippets