Major Sonar & Flashlight rework

• Sonar:
  • Energy cost completely removed (used to be 25)
  • Increased cooldown to 10s from 6s
  • New UI element for sonar cooldown
• Flashlight:
  • Increased energy cost from 1/s to 3/s
• Battery energy boost  reduced to +10 from +20
• Added button to reset Stats on Stats screen

I reworked this to encourage the use of the sonar (a feature we like a lot!) and have it act as a backup tool for the player; the Flashlight  had to be nerfed to counterbalance a more active sonar.

Minor Changes:

• Randomized order of background ambient noises
• Increased volume of key pickup sound effect