Use a universally supported library for file picking

Assets/Scripts/IconMarketplace/IconMarketplaceManager.cs

@@ -18,11 +18,6 @@ public class IconMarketplaceManager : MonoBehaviour
     void Start()
     {
         downloadButton.onClick.AddListener(() => SwitchPanel(1));
-#if !UNITY_STANDALONE_OSX && !UNITY_STANDALONE_WIN && !UNITY_STANDALONE_LINUX && !UNITY_EDITOR
-        uploadButton.interactable = false;
-        uploadButton.transform.GetChild(0).transform.localPosition = new Vector3(0, 10, 0);
-        uploadButton.transform.GetChild(1).GetComponent<TMP_Text>().text = "Unsupported platform";
-#else
         if (BazookaManager.Instance.GetAccountID() != null && BazookaManager.Instance.GetAccountName() != null && BazookaManager.Instance.GetAccountSession() != null)
         {
             uploadButton.onClick.AddListener(() => SwitchPanel(2));
@@ -33,7 +28,6 @@ public class IconMarketplaceManager : MonoBehaviour
             uploadButton.transform.GetChild(0).transform.localPosition = new Vector3(0, 10, 0);
             uploadButton.transform.GetChild(1).GetComponent<TMP_Text>().text = "Not logged in to an account";
         }
-#endif
         SwitchPanel(0);
     }