Log Message:
neomutt: update to 20231103.

2023-11-03  Richard Russon  \<rich@flatcap.org\>
* Features
  - #4080 - info screen: enable \<save-message\>
  - #4075 - add color command
  - color: add ANSI RGB support
  - color: Support ANSI 2x clear sequences
* Bug Fixes
  - #4074 - color: fix palette conversion
  - #4081 - fix logging on error
  - #4081 - log: vim-style
  - #4082 - fix file auto-completion
  - #4090 - improve logic for growing mailbox memory
* Build
  - #4085 - fix CFLAGS/LDFLAGS for ncurses
  - #4085 - configure --with-iconv
* Code
  - #4067 - remove unused count of new mails from index private data
  - #4086 - smtp: Simplify the API of `smtp_code()`
  - #4091 - simplify CLAMP by expressing it with MIN/MAX
  - color: introduce ColorElement
  - color: log gui info on startup
  - color: move business logic out of parsers
  - color: tidy OptNoCurses cases
  - log: add `log_multiline()`
  - test: increase coverage