Refactor font loading from per-document to the portfolio (#659)

* Cleanup default font loading

* Refactor fonts

* Fix menulist mouse navigation

* Format

* Formatting

* Move default font into consts.rs

Co-authored-by: Keavon Chambers <keavon@keavon.com>

editor/src/document/portfolio_message.rs

@@ -1,6 +1,7 @@
 use super::clipboards::Clipboard;
 use crate::message_prelude::*;
 
+use graphene::layers::text_layer::Font;
 use graphene::LayerId;
 
 use serde::{Deserialize, Serialize};
@@ -33,6 +34,17 @@ pub enum PortfolioMessage {
 	Cut {
 		clipboard: Clipboard,
 	},
+	FontLoaded {
+		font_family: String,
+		font_style: String,
+		preview_url: String,
+		data: Vec<u8>,
+		is_default: bool,
+	},
+	LoadFont {
+		font: Font,
+		is_default: bool,
+	},
 	NewDocument,
 	NewDocumentWithName {
 		name: String,