Add ability to prevent ghosting (#12906)

* add ability to prevent ghosting to MindComponent.cs

* make minds preserve properties in certain transfer scenarios

* Revert "make minds preserve properties in certain transfer scenarios"

This reverts commit 333cae0db0faf4ef81767b93332271d944c90a0e.

* move PreventGhosting to the actual mind

Content.Server/Mind/Mind.cs

@@ -109,6 +109,13 @@ namespace Content.Server.Mind
         [ViewVariables]
         public IEnumerable<Objective> AllObjectives => _objectives;
 
+        /// <summary>
+        ///     Prevents user from ghosting out
+        /// </summary>
+        [ViewVariables(VVAccess.ReadWrite)]
+        [DataField("preventGhosting")]
+        public bool PreventGhosting { get; set; }
+
         /// <summary>
         ///     The session of the player owning this mind.
         ///     Can be null, in which case the player is currently not logged in.