How to repeat the same list of buttons?

Hey guys! While doing combo box using buttons I just caught myself on idea, is it possible to make something like: "wanna more? ok. press and get it :)" for instance I have combo boxes with a fruits, vegetables, berries. So, I selected fruit, vegetable, berry and I want to repeat the same combo boxes with a list of fruits, vegetables, berries. Probably I may need something like "Add new fruit, vegetable, berry". So my question is: Is it possible to do "Add new fruit, vegetable, berry", if so please give some feedback :D Regards, Tim

Here is a code an example code:

 using UnityEngine;
 using System.Collections;
 
 public class hibye: MonoBehaviour 
 {
 
     public string slectedItem = "None";
     private bool editing = false;
     
      public string slectedItem2 = "None";
     private bool editing2 = false;
     
     public string slectedItem3 = "None";
     private bool editing3 = false;
     
     private void OnGUI()
     {    
         if ( GUILayout.Button(slectedItem))
         {
             editing = true;
         }
 
         if (editing)
         {
             string[] sig = {"Banana","Apple","Orange"};
     
             for (int x = 0; x < sig.Length ; x++)
             {
                 if (GUILayout.Button(sig[x]))
                 {
                     slectedItem = sig[x];
                     editing = false;
                     
                 }
             }
         }
            if ( GUILayout.Button(slectedItem2))
         {
             editing2 = true;
         }
 
         if (editing2)
         {
             string[] sig = {"Cabbage","Potato","Paprika"};
     
             for (int x = 0; x < sig.Length ; x++)
             {
                 if (GUILayout.Button(sig[x]))
                 {
                     slectedItem2 = sig[x];
                     editing2 = false;
                     
                 }
             }
         }
            if ( GUILayout.Button(slectedItem3))
         {
             editing3 = true;
         }
 
         if (editing3)
         {
             string[] sig = {"Baneberry","Blackberry","Grape"};
     
             for (int x = 0; x < sig.Length ; x++)
             {
                 if (GUILayout.Button(sig[x]))
                 {
                     slectedItem3 = sig[x];
                     editing3 = false;
                     
                 }
             }
         }
 
     }
     
 }

I want to make the code shortest and add another GUILayout.Button which allows me to make choice of existing items one more time without changing existing chosen items.