Add aux loss metric preset (#53)

Author: JavaZeroo

src/metricPresets.js

@@ -2,5 +2,6 @@ export const METRIC_PRESETS = [
   { label: 'Loss', name: 'Loss', mode: 'keyword', keyword: 'loss:' },
   { label: 'Grad Norm', name: 'Grad Norm', mode: 'keyword', keyword: 'norm:' },
   { label: 'Accuracy', name: 'Accuracy', mode: 'keyword', keyword: 'acc:' },
-  { label: 'Learning Rate', name: 'Learning Rate', mode: 'keyword', keyword: 'lr:' }
+  { label: 'Learning Rate', name: 'Learning Rate', mode: 'keyword', keyword: 'lr:' },
+  { label: 'Aux Loss', name: 'aux_loss', mode: 'keyword', keyword: 'load_balancing_loss:' }
 ];