Graph Panel widget: no need for deep watches.

Not sure why we had `deep` set to `true`, but not only it is not needed, but it also (indirectly) slows down the rendering of simulation data.

Author: agarny

src/renderer/src/components/widgets/GraphPanelWidget.vue

@@ -363,7 +363,7 @@ vue.watch(
       updatePlot();
     });
   },
-  { immediate: true, deep: true }
+  { immediate: true }
 );
 
 vue.watch(
@@ -399,7 +399,7 @@ vue.watch(
         }
       });
   },
-  { immediate: true, deep: true }
+  { immediate: true }
 );
 
 vue.watch(