Modules dynamicly reload settings, which should not reloaded this way

[Usernm0]

Build: Develop-2

Steps to reproduce:

1. Open settings -> Messaging Modules -> Levels.
2. Change Experience growth from static to random.
3. Close settings via OK button.
4. We get warning about restart to apply this setting.
5. Open settings -> Messaging Modules -> Levels.

Expected: Levels Settings open.

Bug: On step 5 in console:

Traceback (most recent call last):  
  File "src\modules\gui.py", line 306, in on_tree_ctrl_changed  
  File "src\modules\gui.py", line 489, in fill_page_with_content  
  File "src\modules\gui.py", line 518, in create_page  
  File "src\modules\gui.py", line 559, in create_page_items  
  File "src\modules\interface\functions.py", line 81, in create_static_box  
  File "src\modules\interface\functions.py", line 288, in create_dropdown  
ValueError: tuple.index(x): x not in tuple  

Levels Settings not open.

[DeForce]

Fixed with #461