Populate menu bar

Closes #531

editor/src/messages/portfolio/document/artboard/artboard_message.rs

@@ -19,6 +19,7 @@ pub enum ArtboardMessage {
 		position: (f64, f64),
 		size: (f64, f64),
 	},
+	ClearArtboards,
 	DeleteArtboard {
 		artboard: LayerId,
 	},

editor/src/messages/portfolio/document/artboard/artboard_message_handler.rs

@@ -63,6 +63,11 @@ impl MessageHandler<ArtboardMessage, &FontCache> for ArtboardMessageHandler {
 
 				responses.push_back(DocumentMessage::RenderDocument.into());
 			}
+			ClearArtboards => {
+				for &artboard in self.artboard_ids.iter() {
+					responses.push_front(ArtboardMessage::DeleteArtboard { artboard }.into());
+				}
+			}
 			DeleteArtboard { artboard } => {
 				self.artboard_ids.retain(|&id| id != artboard);
 

editor/src/messages/portfolio/document/document_message.rs

@@ -169,6 +169,8 @@ pub enum DocumentMessage {
 		layer_path: Vec<LayerId>,
 		layer_metadata: LayerMetadata,
 	},
+	ZoomCanvasTo100Percent,
+	ZoomCanvasTo200Percent,
 	ZoomCanvasToFitAll,
 }
 

editor/src/messages/portfolio/document/document_message_handler.rs

@@ -758,6 +758,12 @@ impl MessageHandler<DocumentMessage, (&InputPreprocessorMessageHandler, &FontCac
 			UpdateLayerMetadata { layer_path, layer_metadata } => {
 				self.layer_metadata.insert(layer_path, layer_metadata);
 			}
+			ZoomCanvasTo100Percent => {
+				responses.push_front(MovementMessage::SetCanvasZoom { zoom_factor: 1. }.into());
+			}
+			ZoomCanvasTo200Percent => {
+				responses.push_front(MovementMessage::SetCanvasZoom { zoom_factor: 2. }.into());
+			}
 			ZoomCanvasToFitAll => {
 				if let Some(bounds) = self.document_bounds(font_cache) {
 					responses.push_back(
@@ -785,6 +791,8 @@ impl MessageHandler<DocumentMessage, (&InputPreprocessorMessageHandler, &FontCac
 			SetSnapping,
 			DebugPrintDocument,
 			ZoomCanvasToFitAll,
+			ZoomCanvasTo100Percent,
+			ZoomCanvasTo200Percent,
 			CreateEmptyFolder,
 		);
 

editor/src/messages/portfolio/document/movement/movement_message_handler.rs

@@ -267,7 +267,6 @@ impl MessageHandler<MovementMessage, (&Document, &InputPreprocessorMessageHandle
 			TranslateCanvasBegin,
 			RotateCanvasBegin,
 			ZoomCanvasBegin,
-			SetCanvasZoom,
 			SetCanvasRotation,
 			WheelCanvasZoom,
 			IncreaseCanvasZoom,