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/frontend/frontend_message.rs

@@ -6,6 +6,8 @@ use crate::message_prelude::*;
 use crate::misc::HintData;
 use crate::Color;
 
+use graphene::layers::text_layer::Font;
+
 use serde::{Deserialize, Serialize};
 
 #[remain::sorted]
@@ -23,8 +25,7 @@ pub enum FrontendMessage {
 	TriggerAboutGraphiteLocalizedCommitDate { commit_date: String },
 	TriggerFileDownload { document: String, name: String },
 	TriggerFileUpload,
-	TriggerFontLoad { font_file_url: String },
-	TriggerFontLoadDefault,
+	TriggerFontLoad { font: Font, is_default: bool },
 	TriggerIndexedDbRemoveDocument { document_id: u64 },
 	TriggerIndexedDbWriteDocument { document: String, details: FrontendDocumentDetails, version: String },
 	TriggerRasterDownload { document: String, name: String, mime: String, size: (f64, f64) },