Missing selection_foreground from all themes

[rlerdorf]

I wrote a little command-line script to preview and switch between themes on the fly via a kitty @ set-colors command. However, because none of these themes set the selection_foreground colour the selection foreground colour leaks from the initial theme to the rest. Was it not set for a reason?

[dexpota]

I am not sure but probably the original themes didn't define the foreground color for the selection. I could set that value to foreground if missing. I am going to look into it.