Allow support powers to start with a full charge when created

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

@@ -20,6 +20,10 @@ namespace OpenRA.Mods.Common.Traits
 		public readonly string LongDesc = "";
 		public readonly bool AllowMultiple = false;
 		public readonly bool OneShot = false;
+
+		[Desc("If set to true, the support power will be fully charged when it becomes available. " +
+			"Normal rules apply for subsequent charges.")]
+		public readonly bool StartFullyCharged = false;
 		public readonly string[] Prerequisites = { };
 
 		public readonly string BeginChargeSound = null;

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

@@ -61,7 +61,7 @@ namespace OpenRA.Mods.Common.Traits
 					Powers.Add(key, new SupportPowerInstance(key, this)
 					{
 						Instances = new List<SupportPower>(),
-						RemainingTime = t.Info.ChargeTime * 25,
+						RemainingTime = t.Info.StartFullyCharged ? 0 : t.Info.ChargeTime * 25,
 						TotalTime = t.Info.ChargeTime * 25,
 					});