save project name after loading from file

src/project_save_handler.js

@@ -72,6 +72,8 @@ export class ProjectSaveHandler {
         );
 
         this.projectName.value = code.name;
+        sessionStorage.setItem("project-name", code.name);
+
         const dec = new TextDecoder();
         this.editor.setValue(dec.decode(code.content));