GUI improvements

I've updated the ingame menu to be more clear for new players. Especially highlighting which buttons to press for hiding/showing GUI (G) and healthbars (H).

• updated stellar warfare icon
  
• fixed fighter color trails
  
• updated the Stellar Warfare big logo
  
• fighters and bombers finally seem to work as intended in multiplayer
  
• i should really test singleplayer...
  
• fixed bomber patterns and multiplayer bugs
  
• lowered volume of bombs and the fighter cannons
  
• fixed harvester and surveyor not being attacked by bombers
  
• Cant reproduce bug of audio volume being turned up again in the multiplayer menu after turning it off in the main menu.
  
• fixed crystal not dissapearing bug
  
• optimized height indicators in MP to prevent fps drops
  
• flak should now damage fighters and bombers (even though it doesnt target them)
  
• may have fixed bombers and fighters spawning when allies are in range instead of enemies
  
• updated brontodon thumbnail (thanks algor)
  
• fixed missing ship textures
  
• Simplified the escape menu
  
• spent a few hours trying to figure out how to upload new builds for @🥇 patreon Backer reward role to steam in order to give them the latest builds sooner