Fewer ace.setValue, fix backspace key, ispallette bit.
Fewer ace.setValue, fix backspace key, ispallette bit.

dweintrop/droplet,droplet-editor/droplet,sakagg/droplet,joshlory/droplet,joshlory/droplet,dweintrop/droplet,PencilCode/droplet,PencilCode/droplet,sakagg/droplet,droplet-editor/droplet