Removing extra transform change (less overhead in Scenery then)
Setting non-interactive nodes to pickable: false (allows hit-testing to prune those nodes, so we can determine what is under the mouse/touch much faster)
Converting 3 transform changes to 1 transform change for the BatteryView's setVoltage (lowers Scenery overhead)
Non-interactive parts of control panel, and the volume on/off shapes are made unpickable, for increased hit detection speed
Collapsing 4 transform changes into one in FormulaView (potential future item)
Updating package.json preload to include all necessary files, instead of the "include". Fixes the chipper build for this sim.
Only updating visible batteries, instead of all of them
Merging in performance branch