Fix for #3930: Empty loop error

Conflicts:
	source/hudInstructions.js
Fix for #3966: Radio not showing up upon scenario reset
Fix for #3970: Blockly behind subtitles
Fix for #3960: Blockly closing on scenario start
Fix for #3971: Objects visible under ramp
Fixed indentation.
Merge pull request #361 from virtual-world-framework/pest-control

Pest control