On the way to being fixed...
All grid tiles fixed.
Merge pull request #320 from virtual-world-framework/grid-canyon-fixes

Widen grid in canyon and fix some other grid spots
Added switch scenario functionality
Merge pull request #318 from virtual-world-framework/pause-menu

Added switch scenario functionality
Factor in scrolling offset to blockly trace arrow
Merge pull request #319 from virtual-world-framework/trace-fixes

Blockly trace fixes
Add playVideo action
Fix getting video from its source