Prevent editor from closing on invalid numeric prompt input

main/src/main/java/me/blackvein/quests/QuestFactory.java

@@ -242,7 +242,7 @@ public class QuestFactory implements ConversationAbandonedListener {
                 context.getForWhom().sendRawMessage(ChatColor.YELLOW + Lang.get("exited"));
                 return Prompt.END_OF_CONVERSATION;
             default:
-                return null;
+                return new QuestMenuPrompt(context);
             }
         }
     }
@@ -511,7 +511,7 @@ public class QuestFactory implements ConversationAbandonedListener {
             case 15:
                 return new ExitPrompt(context);
             default:
-                return null;
+                return new QuestMainPrompt(context);
             }
         }
     }

main/src/main/java/me/blackvein/quests/actions/ActionFactory.java

@@ -252,7 +252,7 @@ public class ActionFactory implements ConversationAbandonedListener {
                 ((Player) context.getForWhom()).sendMessage(ChatColor.YELLOW + Lang.get("exited"));
                 return Prompt.END_OF_CONVERSATION;
             default:
-                return null;
+                return new ActionMenuPrompt(context);
             }
         }
     }
@@ -428,7 +428,7 @@ public class ActionFactory implements ConversationAbandonedListener {
             case 10:
                 return new ExitPrompt();
             default:
-                return null;
+                return new ActionMainPrompt(context);
             }
         }
     }

main/src/main/java/me/blackvein/quests/convo/quests/prompts/BlocksPrompt.java

@@ -193,7 +193,7 @@ public class BlocksPrompt extends QuestsEditorNumericPrompt {
                 return Prompt.END_OF_CONVERSATION;
             }
         default:
-            return null;
+            return new BlocksPrompt(stageNum, context);
         }
     }
     

main/src/main/java/me/blackvein/quests/convo/quests/prompts/DateTimePrompt.java

@@ -213,7 +213,7 @@ public class DateTimePrompt extends QuestsEditorNumericPrompt {
             }
             return oldPrompt;
         default:
-            return null;
+            return new DateTimePrompt(context, oldPrompt, source);
         }
     }
     

main/src/main/java/me/blackvein/quests/convo/quests/prompts/GUIDisplayPrompt.java

@@ -111,7 +111,7 @@ public class GUIDisplayPrompt extends QuestsEditorNumericPrompt {
         case 3:
             return plugin.getQuestFactory().returnToMenu(context);
         default:
-            return null;
+            return new GUIDisplayPrompt(context);
         }
     }
 }

main/src/main/java/me/blackvein/quests/convo/quests/prompts/ItemsPrompt.java

@@ -193,7 +193,7 @@ public class ItemsPrompt extends QuestsEditorNumericPrompt {
                 return Prompt.END_OF_CONVERSATION;
             }
         default:
-            return null;
+            return new ItemsPrompt(stageNum, context);
         }
     }
     

main/src/main/java/me/blackvein/quests/convo/quests/prompts/MobsPrompt.java

@@ -213,7 +213,7 @@ public class MobsPrompt extends QuestsEditorNumericPrompt {
                 return Prompt.END_OF_CONVERSATION;
             }
         default:
-            return null;
+            return new MobsPrompt(stageNum, context);
         }
     }
     

main/src/main/java/me/blackvein/quests/convo/quests/prompts/NPCsPrompt.java

@@ -198,7 +198,7 @@ public class NPCsPrompt extends QuestsEditorNumericPrompt {
                 return Prompt.END_OF_CONVERSATION;
             }
         default:
-            return null;
+            return new NPCsPrompt(stageNum, context);
         }
     }
     

main/src/main/java/me/blackvein/quests/convo/quests/prompts/OptionsPrompt.java

@@ -106,7 +106,7 @@ public class OptionsPrompt extends QuestsEditorNumericPrompt {
         case 3:
             return plugin.getQuestFactory().returnToMenu(context);
         default:
-            return null;
+            return new OptionsPrompt(context);
         }
     }
     

main/src/main/java/me/blackvein/quests/convo/quests/prompts/PlannerPrompt.java

@@ -166,7 +166,7 @@ public class PlannerPrompt extends QuestsEditorNumericPrompt {
         case 5:
             return plugin.getQuestFactory().returnToMenu(context);
         default:
-            return null;
+            return new PlannerPrompt(context);
         }
     }
 

main/src/main/java/me/blackvein/quests/convo/quests/prompts/RequirementsPrompt.java

@@ -369,7 +369,7 @@ public class RequirementsPrompt extends QuestsEditorNumericPrompt {
         case 11:
             return plugin.getQuestFactory().returnToMenu(context);
         default:
-            return null;
+            return new RequirementsPrompt(context);
         }
     }
     

main/src/main/java/me/blackvein/quests/convo/quests/prompts/RewardsPrompt.java

@@ -415,7 +415,7 @@ public class RewardsPrompt extends QuestsEditorNumericPrompt {
         case 12:
             return plugin.getQuestFactory().returnToMenu(context);
         default:
-            return null;
+            return new RewardsPrompt(context);
         }
     }
     

main/src/main/java/me/blackvein/quests/convo/quests/prompts/StageMainPrompt.java

@@ -241,9 +241,10 @@ public class StageMainPrompt extends QuestsEditorNumericPrompt {
                 return "";
             }
         case 4:
-            if (context.getSessionData(stagePrefix + CK.S_MOB_TYPES) == null 
-                    && context.getSessionData(stagePrefix + CK.S_FISH) == null 
+            if (context.getSessionData(stagePrefix + CK.S_MOB_TYPES) == null
                     && context.getSessionData(stagePrefix + CK.S_TAME_TYPES) == null 
+                    && context.getSessionData(stagePrefix + CK.S_FISH) == null 
+                    && context.getSessionData(stagePrefix + CK.S_COW_MILK) == null
                     && context.getSessionData(stagePrefix + CK.S_SHEAR_COLORS) == null) {
                 return ChatColor.GRAY + "(" + Lang.get("noneSet") + ")";
             } else {