Also, fix detection of IE so it works. Apparently bowser.name !== 'IE' on IE with bowser. bowser.msie works though.

bowser correctly detects Chrome Headless as Chrome, is already used by scratchr2, and is more actively maintained than platform.

- better split of hash-parser/project-loader unit tests.

Including triple scrollbars on list monitors and fixing the say bubble fonts

The project loader that is exported with GUI just expects to be passed projectId as a prop, and it manages loading project data.

The part of the project loader that watches for URL hash changes for the playground is a new HOC that is only used in the various playground examples.

Includes:
- context menu for switching to sliders, only on variables.
- width, height, min, max properties consumed from VM.

Fixes #1853

It was 435KB. Now it's 5KB. I used SVGOMG: https://jakearchibald.github.io/svgomg/

Root cause is probably the flex implementation on Safari.