model view remove and insert components (#2351)

* added the ability to remove a component from a container to insert it to a position

src/sql/parts/modelComponents/modelStore.ts

@@ -51,6 +51,7 @@ export class ModelStore implements IModelStore {
 		let id = component.descriptor.id;
 		this._componentMappings[id] = undefined;
 		this._componentActions[id] = undefined;
+		this._descriptorMappings[id] = undefined;
 		// TODO notify model for cleanup
 	}