Fix flycam and arcball not having same reset parameters

* Both were centring around the AABB but arcball had a scale applied to the
  distance

qrenderdoc/Windows/BufferViewer.cpp

@@ -7571,7 +7571,7 @@ void BufferViewer::on_autofitCamera_clicked()
       mid = transformedMid;
     }
 
-    mid.z -= len;
+    mid.z -= len * 0.7f;
 
     m_Flycam->Reset(mid);
   }