Change responses to use classes instead of interfaces (#394)

* ability to mark an open document as unsaved

* unsaved detection now being triggered based on layer tree height

* Changed responses to use classes instead of interfaces

* - rust implementation of unsaved markers
- upgraded eslint

* updated eslint in package.json

* - Renamed GetOpenDocumentsList -> UpdateOpenDocumentsList
- is not -> was not

* changed hash to current identifier to better reflect its meaning

* resolve some merge conflicts

* removed console.log statement leftover from debuging

* - changed Response to jsMessage
- split files
- Array<> -> []

* -remove path from UpdateLayer

* - remove unused if statements

* - comment for reflect-metadata
- registerJsMessageHandler -> subscribeJsMessage
- readonly message properties
- fixed binding filename and comment
- toRgb -> toRgba

* - newOpacity -> transformer
- added comments

* MessageMaker -> messageMaker

editor/src/document/document_file.rs

@@ -153,7 +153,7 @@ impl DocumentMessageHandler {
 		}
 		self.layer_data(path).selected = true;
 		let data = self.layer_panel_entry(path.to_vec()).ok()?;
-		(!path.is_empty()).then(|| FrontendMessage::UpdateLayer { path: path.to_vec().into(), data }.into())
+		(!path.is_empty()).then(|| FrontendMessage::UpdateLayer { data }.into())
 	}
 
 	pub fn selected_layers_bounding_box(&self) -> Option<[DVec2; 2]> {
@@ -621,7 +621,7 @@ impl MessageHandler<DocumentMessage, &InputPreprocessor> for DocumentMessageHand
 			LayerChanged(path) => {
 				responses.extend(self.layer_panel_entry(path.clone()).ok().and_then(|entry| {
 					let overlay = self.graphene_document.layer(&path).unwrap().overlay;
-					(!overlay).then(|| FrontendMessage::UpdateLayer { path: path.into(), data: entry }.into())
+					(!overlay).then(|| FrontendMessage::UpdateLayer { data: entry }.into())
 				}));
 			}