Name Visible
( text link )
Enabled
( image link )
Name_1   Yes  
Name_3   No  
Name_4   Yes  
Name_5   No  
Name_6   No  
Name_7   No  
Name_8   Yes  
Name_9   Yes  
Name_10   Yes  
Name_11   No  
Name_12   Yes  
Name_13   No  
Name_14   Yes  
Name_15   No  
Name_16   No  
Name_17   Yes  
Name_18   Yes  
Name_19   No  
Name_20   Yes  
Name_21   Yes  

To verify how work this behavior click on
the link in the column "Visible" and "Enabled"