[Feature Request] Add Profiles to xfce4-terminal

I always use a non-transparent, single-colour background because a semi-transparent background makes me feel uncomfortable in that I tend to find it difficult to distinguish between text displayed inside the terminal and text from the window behind (e.g. a website in my browser).

However, I often get situations where you need to type something into the terminal but at the same time you frequently need to look at the window in the background for reference, e.g. when typing longer commands, code, etc.

In these cases, I always wish I could toggle semi-transparency via a hotkey so I can set my terminal to be semi-transparent, type and at the same time refer to what's being displayed in the background window, and, when done, reset my terminal to a non-transparent background.

I think this would come in handy for a many users, making work with the Xfce terminal even more comfortable. Let me know what you think of this proposal.

Thank you very much for your work!