[client] add ImPlot and rework latency graphs

client/displayservers/Wayland/presentation.c

@@ -88,6 +88,7 @@ bool waylandPresentationInit(void)
     wlWm.photonTimings = ringbuffer_new(256, sizeof(float));
     wlWm.photonGraph   = app_registerGraph("PHOTON", wlWm.photonTimings,
         0.0f, 30.0f, NULL);
+    app_setGraphCompact(wlWm.photonGraph, true);
     wp_presentation_add_listener(wlWm.presentation, &presentationListener, NULL);
   }
   return true;