Elliot Bobrow

Just a small thing, but this confused me a little at first. When `short_line_list` is empty, the short line isn't used for inactive windows.

This allows multiple hints to be displayed on a line, as mentioned in https://github.com/nvim-lua/lsp_extensions.nvim/issues/14#issuecomment-772909849. The current implementation only allows hints of the same kind to appear on a line because...