Add key handling to order generators.

OpenRA.Mods.Common/Orders/OrderGenerator.cs

@@ -30,6 +30,7 @@ namespace OpenRA.Mods.Common.Orders
 		IEnumerable<IRenderable> IOrderGenerator.RenderAboveShroud(WorldRenderer wr, World world) { return RenderAboveShroud(wr, world); }
 		string IOrderGenerator.GetCursor(World world, CPos cell, int2 worldPixel, MouseInput mi) { return GetCursor(world, cell, worldPixel, mi); }
 		void IOrderGenerator.Deactivate() { }
+		bool IOrderGenerator.HandleKeyPress(KeyInput e) { return false; }
 
 		protected abstract void Tick(World world);
 		protected abstract IEnumerable<IRenderable> Render(WorldRenderer wr, World world);

OpenRA.Mods.Common/Traits/SupportPowers/SelectDirectionalTarget.cs

@@ -144,6 +144,8 @@ namespace OpenRA.Mods.Common.Traits
 
 		string IOrderGenerator.GetCursor(World world, CPos cell, int2 worldPixel, MouseInput mi) { return cursor; }
 
+		bool IOrderGenerator.HandleKeyPress(KeyInput e) { return false; }
+
 		void IOrderGenerator.Deactivate()
 		{
 			if (activated)

OpenRA.Mods.Common/Widgets/ViewportControllerWidget.cs

@@ -495,7 +495,7 @@ namespace OpenRA.Mods.Common.Widgets
 				}
 			}
 
-			return false;
+			return world.OrderGenerator.HandleKeyPress(e);
 		}
 
 		ScrollDirection CheckForDirections()