TUI: Reset cursor color when applicable #8572

Resets the TUI cursor color if:
- current 'guicursor' mode does not specify a highlight group
- cursor highlight group has "inverse" or "reverse" flag
- on Nvim exit

We interpret,  "inverse" to mean "default cursor".

Example:

    hi Cursor guifg=bg guibg=fg
    set termguicolors
    set guicursor=n-v-c-sm:block,i-ci-ve:ver25-Cursor,r-cr-o:hor20

    * When the cursor shape is block, its color will be "inverse"
    * When the cursor shape is I-beam, its color will be `hi Cursor`.

This is useful e.g. to prevent `set listchars=eol:¬` causing your cursor
color to a low contrast color in insert mode because you cursor are
often at EOL in insert mode.

close #8572

0 files changed, 0 insertions, 0 deletions