Can't choose icon type in action editor (QT Designer)

[Rangerguy128]

I found some icons that I would have liked to add to the toolbar. One of these, representing the "left arrow", would be greyed out on the main window but would be blue in the others as it's only use to go back to the main interface. However, as I choose an icon type for it (Disabled Off/On) through QT Designer, it always goes back to "Normal Off", and I'm not sure how I could fix this, even in .py code. Any advice?

Here's what I'm referring to:

[Bonnie]

Here just let you to choose the icon for the corresponding state, you cannot set the icon state of an action directly.
If you want to set the action to disabled, look at the right panel when you select the action, and uncheck "enabled"