Updated pronouns to reflect current rules and oracle text

Replaced all instances of "her or she", "him or her", and "his or her", with "they", "them", and "their", or sometimes "that player". Updated verbs where appropriate.

Mage.Common/src/main/java/mage/remote/SessionImpl.java

@@ -502,7 +502,7 @@ public class SessionImpl implements Session {
 
     /**
      * @param askForReconnect - true = connection was lost because of error and
-     *                        ask the user if he want to try to reconnect
+     *                        ask the user if they want to try to reconnect
      */
     @Override
     public synchronized void disconnect(boolean askForReconnect) {

Mage.Common/src/main/java/mage/view/PermanentView.java

@@ -111,8 +111,8 @@ public class PermanentView extends CardView {
                     this.rules.add("A manifested creature card can be turned face up any time for it's mana cost."
                             + " A face-down card can also be turned face up for its morph cost.");
                 } else if (permanent.isMorphed()) {
-                    this.rules.add("If the controller has priority, he or she may turn this permanent face up."
-                            + " This is a special action; it doesn't use the stack. To do this he or she pays the morph costs,"
+                    this.rules.add("If the controller has priority, they may turn this permanent face up."
+                            + " This is a special action; it doesn't use the stack. To do this they pay the morph costs,"
                             + " then turns this permanent face up.");
                 }
             }