bugfix: only send a request when current_file is set

Signed-off-by: Stefan Dej <meteyou@gmail.com>

src/App.vue

@@ -141,7 +141,7 @@ export default class App extends Mixins(BaseMixin) {
 
     @Watch('current_file')
     current_fileChanged(newVal: string) {
-        this.$socket.emit("server.files.metadata", { filename: newVal }, { action: "files/getMetadataCurrentFile" });
+        if (newVal !== "") this.$socket.emit("server.files.metadata", { filename: newVal }, { action: "files/getMetadataCurrentFile" });
     }
 
     @Watch('primaryColor')