Can not change text in a actionbutton.

After a lot of tries, I didn't achieve it to change the text in a actionbutton. 
If I change it in Mendix Modeler and Save and Run the App, it won't be Visible in the App.

For example:
I want to change the text in the button from 'Action' to 'Wishlist'.
In the modeler it is changed, but in the App it is still 'Action'.

Who can help me out?