De-emphasize unavailable Great People

[vttale]

Is your feature request related to a problem? Please describe.
When there are no more Great People available of a given type, their pane in the Great People window still takes up a lot of screen real estate. This is especially egregious with the Great Prophet pane, which occupies prime real estate right in the middle of the panel even though they are all taken for the majority of most games. Even on a wide screen monitor that often puts the Great Musicians off the edge of the visible panel for the sake of the trivial information that there are no more prophets.

Describe the solution you'd like
Ideally, for minimal screen real estate cost, I would just make a line on the bottom of the panel saying something like: "No longer available: Great Prophet, Great Scientist". Alternatively, to maintain a sense of graphic design I'd remove the panes for each unavailable Great Person and add a final pane on the right that listed the unavailable ones.

[Infixo]

In Real Great People the prophet is moved to the far right exactly because I hated that hole in the middle. That at least leaves a bit more space for others so the issue with lack of space is less annoying.