Hi,
I think you misunderstood me. I don't want to disable the text input. All the methods above (as well as turning the text box invisible, btw) unable the player to type values in the text box. I don't want to do that.
What I want to do is disable cursor selection of the text box text, or alternatively make the cursor highlighting effect invisible. You see, you can turn the text box text invisible, but after that you can still highlight it with the cursor, which then makes that text visible again.
See how the text box numbers become visible when I highlighted them with the cursor? I just want to disable that feature. I also don't really want to make the whole text box invisible or move it away since I like those arrows that you can click to increase or decrease the value by one.