Resource folder setters should not allow root-level assets.

[adam-coster]

stitch/src/lib/components/resources/Gms2ResourceBase.ts

Lines 57 to 73 in ebad310

	set folder(folderName:string){
	if (folderName.match(/\.yyp/g)){
	//This means the resource should be at the root level of the project, such as
	// "parent": {
	// "name": "sample-project",
	// "path": "sample-project.yyp",
	// },
	this.yyData.parent.name = folderName.replace(/\.yyp/g, "");
	this.yyData.parent.path = folderName;
	}
	else{
	this.yyData.parent.name = folderName;
	this.yyData.parent.path = `folders/${folderName}.yy`;
	}
	this.save();
	}

The resource folder setter does not take into account root-level resources, which use a totally different system for naming parents. For now we should throw an error when there is an attempt to use root-level folders, since they'll make everything more complicated and aren't strictly required.