More portal fixes (#13359)

fixes https://github.com/space-wizards/space-station-14/issues/13338
fixes https://github.com/space-wizards/space-station-14/issues/13337

Content.Server/Explosion/Components/TriggerOnCollideComponent.cs

@@ -5,5 +5,11 @@ namespace Content.Server.Explosion.Components
     {
 		[DataField("fixtureID", required: true)]
 		public string FixtureID = String.Empty;
+
+        /// <summary>
+        ///     Doesn't trigger if the other colliding fixture is nonhard.
+        /// </summary>
+        [DataField("ignoreOtherNonHard")]
+        public bool IgnoreOtherNonHard = true;
     }
 }

Content.Server/Explosion/EntitySystems/TriggerSystem.cs

@@ -102,7 +102,7 @@ namespace Content.Server.Explosion.EntitySystems
 
         private void OnTriggerCollide(EntityUid uid, TriggerOnCollideComponent component, ref StartCollideEvent args)
         {
-			if(args.OurFixture.ID == component.FixtureID)
+			if(args.OurFixture.ID == component.FixtureID && (!component.IgnoreOtherNonHard || args.OtherFixture.Hard))
 				Trigger(component.Owner);
         }
 

Content.Shared/Teleportation/Systems/LinkedEntitySystem.cs

@@ -40,7 +40,7 @@ public sealed class LinkedEntitySystem : EntitySystem
         // Remove any links to this entity when deleted.
         foreach (var ent in component.LinkedEntities.ToArray())
         {
-            if (LifeStage(ent) < EntityLifeStage.Terminating && TryComp<LinkedEntityComponent>(ent, out var link))
+            if (!Deleted(ent) && LifeStage(ent) < EntityLifeStage.Terminating && TryComp<LinkedEntityComponent>(ent, out var link))
             {
                 TryUnlink(uid, ent, component, link);
             }