Desktop: Add File > Save As… (#3034)

* Make file name and document name identical

* Add save as action

* Fix test errors

* Add missing save as action

* Desktop fix drop file open document file message

* Address review comments

* Replace file save suffix with file extension

* Add comment specifying that the upload function takes a html input accept string

* Fix remove file extension in web

* Use let

* Don't show save as menu entry in web

* Don't add SaveDocumentAs in web

* Remove file extension on all open document file calls

---------

Co-authored-by: Dennis Kobert <dennis@kobert.dev>

editor/src/messages/portfolio/menu_bar/menu_bar_message_handler.rs

@@ -101,14 +101,25 @@ impl LayoutHolder for MenuBarMessageHandler {
 							..MenuBarEntry::default()
 						},
 					],
-					vec![MenuBarEntry {
-						label: "Save".into(),
-						icon: Some("Save".into()),
-						shortcut: action_keys!(DocumentMessageDiscriminant::SaveDocument),
-						action: MenuBarEntry::create_action(|_| DocumentMessage::SaveDocument.into()),
-						disabled: no_active_document,
-						..MenuBarEntry::default()
-					}],
+					vec![
+						MenuBarEntry {
+							label: "Save".into(),
+							icon: Some("Save".into()),
+							shortcut: action_keys!(DocumentMessageDiscriminant::SaveDocument),
+							action: MenuBarEntry::create_action(|_| DocumentMessage::SaveDocument.into()),
+							disabled: no_active_document,
+							..MenuBarEntry::default()
+						},
+						#[cfg(not(target_family = "wasm"))]
+						MenuBarEntry {
+							label: "Save As…".into(),
+							icon: Some("Save".into()),
+							shortcut: action_keys!(DocumentMessageDiscriminant::SaveDocumentAs),
+							action: MenuBarEntry::create_action(|_| DocumentMessage::SaveDocumentAs.into()),
+							disabled: no_active_document,
+							..MenuBarEntry::default()
+						},
+					],
 					vec![
 						MenuBarEntry {
 							label: "Import…".into(),