Demo 1.5.4 patch note

This is a small patch, addressing the feedback we have received so far on the demo.

• Highlighted the supply chests for better visibility.
  
• Fixed a bug that prevented the retrieval of a supply chest at the start of the round if there was a successful retrieval in the previous round.
  
• Units now correctly face the supply chest when they start the chest retrieving process.
  
• Gave a hint where the player can find the rebel base in the objective description.
  
• Slightly changed the font to make + and - more distinct.