Add color type for prompts.

This adds a new color type, MT_COLOR_PROMPT, that can be used to
colorize prompts (fields, yes/no, multi_choice).

Thanks to Ben Boeckel for the patch!

color.c

···
   { "bold",		MT_COLOR_BOLD },
   { "underline",	MT_COLOR_UNDERLINE },
   { "index",		MT_COLOR_INDEX },
+  { "prompt",		MT_COLOR_PROMPT },
   { NULL,		0 }
 };
 

contrib/colors.default

···
 color quoted blue white
 color signature red white
 color attachment red white
+color prompt brightmagenta white
 color message brightred white
 color error brightred white
 color indicator brightyellow red

contrib/colors.linux

···
 color quoted blue black
 color signature blue black
 color attachment red black
+color prompt brightmagenta black
 color message brightred black
 color error brightred black
 color indicator black red

curs_lib.c

···
   do
   {
     CLEARLINE (LINES-1);
+    SETCOLOR (MT_COLOR_PROMPT);
     addstr ((char *)field); /* cast to get around bad prototypes */
+    NORMAL_COLOR;
     mutt_refresh ();
     getyx (stdscr, y, x);
     ret = _mutt_enter_string (buf, buflen, y, x, complete, multiple, files, numfiles, es);
···
   answer_string_len = mutt_strwidth (answer_string);
   /* maxlen here is sort of arbitrary, so pick a reasonable upper bound */
   msglen = mutt_wstr_trunc (msg, 4*COLS, COLS - answer_string_len, NULL);
+  SETCOLOR (MT_COLOR_PROMPT);
   addnstr (msg, msglen);
   addstr (answer_string);
+  NORMAL_COLOR;
   FREE (&answer_string);
 
   FOREVER
···
   int choice;
   char *p;
 
+  SETCOLOR (MT_COLOR_PROMPT);
   mvaddstr (LINES - 1, 0, prompt);
+  NORMAL_COLOR;
   clrtoeol ();
   FOREVER
   {

doc/manual.xml.head

···
 <listitem><para>markers (the <quote>+</quote> markers at the beginning of wrapped lines in the pager)</para></listitem>
 <listitem><para>message (informational messages)</para></listitem>
 <listitem><para>normal</para></listitem>
+<listitem><para>prompt</para></listitem>
 <listitem><para>quoted (text matching <link linkend="quote-regexp">$quote_regexp</link> in the body of a message)</para></listitem>
 <listitem><para>quoted1, quoted2, ..., quoted<emphasis>N</emphasis> (higher levels of quoting)</para></listitem>
 <listitem><para>search (highlighting of words in the pager)</para></listitem>

doc/muttrc.man.head

···
 .BR hdrdefault ", " index ", " indicator ", " markers ", "
 .BR message ", " normal ", " quoted ", " quoted\fIN\fP ", "
 .BR search ", " signature ", " status ", " tilde ", " tree ", "
-.BR underline .
+.BR underline ", " prompt .
 The
 .BR body " and " header
 objects allow you to restrict the colorization to a regular

mutt_curses.h

···
   MT_COLOR_BOLD,
   MT_COLOR_UNDERLINE,
   MT_COLOR_INDEX,
+  MT_COLOR_PROMPT,
   MT_COLOR_MAX
 };