undoing a rationalisation that I thought was clever but in fact breaks things
renaming test-launcher.html to test-tools.html and making so the page for creating tests comes up with 800x600 canvas so there is space for controls on its right side
apparently no need for absolute positioning of the world canvas
the SystemTests page now has a mock panel to the right where some links/buttons can be added as shortcuts to console commands.
the System Tests Control Panel now contains links to trigger the usual commands used when creating system tests
adding console output panel to the System Tests Control Panel (with method to add messages to it). Works for screenshot comparison results messages so far.
making the "download failed screenshots" mechanism to work in Safari. Also adjusting to image data loading is actually treated as asynchronous now.