The Page Title you have circled represents the popup window header. I am not sure if you can get rid of that – maybe someone with more css experience than me has some ideas about how to do that.
Update – just did a bit of research. Seems like the title bar of a popup is visible or not based on browser preferences (set by the user) and many modern browsers don’t support hiding that title bar.
You can write in Styling like this:
1-You have to enter the app,
2-You have to enter the Styling,
3-You have to enter the Custom-variables.scss
4- You have to write: