Zero-K v1.8.9.0 - Aim Lookahead and Plate Fixes

This is a quick patch to fix a few lingering issues with some of the Construction Plates, as well as to fix a few other bugs. The largest change is the application of aim lookahead to most raiders and riots. Units such as Glaive, Scorcher, Dagger, Mace and Redback now turn to aim at their targets before they enter range. The units that had the most to gain from lookahead, such as Kodachi, already had it, except for Archer, which gains lookahead in this patch.

• Applied lookahead aiming to most remaining raiders and riots.
  
• Slightly increased Dirtbag mound so that it blocks bots consistently.
  
• Worked around rare Widow misses.
  
• Improved and fixed effects for sonic blasters.
  
• Fixed Shieldbot Plate yardmap not quite being a rectangle.
  
• Fixed Jumpbot Plate icon.
  
• Fixed Amphbot Plate underwater placement (the mouse traces were colliding with the sea).
  
• Fixed Hovercraft Plate not letting units pass its open areas.
  
• Fixed custom HUD panel placement breaking with UI scaling.
  
• Blocked NaN command params from widgets.
  
• Fixed Crab helptext regarding its armour.