Retire layer paths used throughout the code (#1531)

* Part 1

* Part 2

* Part 3

* Part 4

* Part 5

* Part 6

* Part 7

* Part 8

editor/src/messages/frontend/frontend_message.rs

@@ -80,7 +80,7 @@ pub enum FrontendMessage {
 	TriggerImport,
 	TriggerIndexedDbRemoveDocument {
 		#[serde(rename = "documentId")]
-		document_id: u64,
+		document_id: DocumentId,
 	},
 	TriggerIndexedDbWriteDocument {
 		document: String,
@@ -111,7 +111,7 @@ pub enum FrontendMessage {
 	// Update prefix: give the frontend a new value or state for it to use
 	UpdateActiveDocument {
 		#[serde(rename = "documentId")]
-		document_id: u64,
+		document_id: DocumentId,
 	},
 	UpdateDialogButtons {
 		#[serde(rename = "layoutTarget")]
@@ -139,11 +139,11 @@ pub enum FrontendMessage {
 	UpdateDocumentLayerDetails {
 		data: LayerPanelEntry,
 	},
-	UpdateDocumentLayerTreeStructure {
+	UpdateDocumentLayerStructure {
 		#[serde(rename = "dataBuffer")]
 		data_buffer: RawBuffer,
 	},
-	UpdateDocumentLayerTreeStructureJs {
+	UpdateDocumentLayerStructureJs {
 		#[serde(rename = "dataBuffer")]
 		data_buffer: JsRawBuffer,
 	},
@@ -180,7 +180,7 @@ pub enum FrontendMessage {
 	},
 	UpdateImageData {
 		#[serde(rename = "documentId")]
-		document_id: u64,
+		document_id: DocumentId,
 		#[serde(rename = "imageData")]
 		image_data: Vec<FrontendImageData>,
 	},