Create R_MENU redraw option.

Previously, the R_INDEX option meant both the index as well as all
other menus.  The removal of the OPTFORCEREDRAWINDEX option caused problems
with redrawing other menus for options such as arrow_cursor.

One solution would be change R_INDEX back to meaning "everything"
except pager, but there are only a handful of options that affect
other menus.

Instead, create R_MENU to indicate options that affect either all
menus or one of the other menus beside the index and pager.

init.c

@@ -1806,6 +1806,8 @@ static void mutt_restore_default (struct option_t *p)
   if (p->flags & R_SIDEBAR)
     mutt_set_current_menu_redraw (REDRAW_SIDEBAR);
 #endif
+  if (p->flags & R_MENU)
+    mutt_set_current_menu_redraw_full ();
 }
 
 static size_t escape_string (char *dst, size_t len, const char* src)
@@ -2584,6 +2586,8 @@ static int parse_set (BUFFER *tmp, BUFFER *s, unsigned long data, BUFFER *err)
       if (MuttVars[idx].flags & R_SIDEBAR)
         mutt_set_current_menu_redraw (REDRAW_SIDEBAR);
 #endif
+      if (MuttVars[idx].flags & R_MENU)
+        mutt_set_current_menu_redraw_full ();
     }
   }
   return (r);

init.h

@@ -57,14 +57,15 @@
 
 /* forced redraw/resort types */
 #define R_NONE		0
-#define R_INDEX		(1<<0)
-#define R_PAGER		(1<<1)
+#define R_INDEX		(1<<0)  /* redraw the index menu (MENU_MAIN) */
+#define R_PAGER		(1<<1)  /* redraw the pager menu */
 #define R_RESORT	(1<<2)	/* resort the mailbox */
 #define R_RESORT_SUB	(1<<3)	/* resort subthreads */
 #define R_RESORT_INIT	(1<<4)  /* resort from scratch */
 #define R_TREE		(1<<5)  /* redraw the thread tree */
 #define R_REFLOW        (1<<6)  /* reflow window layout and full redraw */
 #define R_SIDEBAR       (1<<7)  /* redraw the sidebar */
+#define R_MENU          (1<<8)  /* redraw all menus */
 #define R_BOTH		(R_INDEX | R_PAGER)
 #define R_RESORT_BOTH	(R_RESORT | R_RESORT_SUB)
 
@@ -152,7 +153,7 @@ struct option_t MuttVars[] = {
   ** and give it the same color as your attachment color (see also
   ** $$crypt_timestamp).
   */
-  { "arrow_cursor",	DT_BOOL, R_BOTH, OPTARROWCURSOR, 0 },
+  { "arrow_cursor",	DT_BOOL, R_MENU, OPTARROWCURSOR, 0 },
   /*
   ** .pp
   ** When \fIset\fP, an arrow (``->'') will be used to indicate the current entry
@@ -405,7 +406,7 @@ struct option_t MuttVars[] = {
   ** When \fIunset\fP, Mutt will not collapse a thread if it contains any
   ** unread messages.
   */
-  { "compose_format",	DT_STR,	 R_BOTH, UL &ComposeFormat, UL "-- Mutt: Compose  [Approx. msg size: %l   Atts: %a]%>-" },
+  { "compose_format",	DT_STR,	 R_MENU, UL &ComposeFormat, UL "-- Mutt: Compose  [Approx. msg size: %l   Atts: %a]%>-" },
   /*
   ** .pp
   ** Controls the format of the status line displayed in the ``compose''
@@ -604,7 +605,7 @@ struct option_t MuttVars[] = {
   ** If \fI``no''\fP, never attempt to verify cryptographic signatures.
   ** (Crypto only)
   */
-  { "date_format",	DT_STR,	 R_BOTH, UL &DateFmt, UL "!%a, %b %d, %Y at %I:%M:%S%p %Z" },
+  { "date_format",	DT_STR,	 R_MENU, UL &DateFmt, UL "!%a, %b %d, %Y at %I:%M:%S%p %Z" },
   /*
   ** .pp
   ** This variable controls the format of the date printed by the ``%d''
@@ -814,7 +815,7 @@ struct option_t MuttVars[] = {
   ** you use ``+'' or ``='' for any other variables since expansion takes place
   ** when handling the ``$mailboxes'' command.
   */
-  { "folder_format",	DT_STR,	 R_INDEX, UL &FolderFormat, UL "%2C %t %N %F %2l %-8.8u %-8.8g %8s %d %f" },
+  { "folder_format",	DT_STR,	 R_MENU, UL &FolderFormat, UL "%2C %t %N %F %2l %-8.8u %-8.8g %8s %d %f" },
   /*
   ** .pp
   ** This variable allows you to customize the file browser display to your
@@ -1107,14 +1108,14 @@ struct option_t MuttVars[] = {
   ** Also see $$use_domain and $$hidden_host.
   */
 #ifdef HAVE_LIBIDN
-  { "idn_decode",	DT_BOOL, R_BOTH, OPTIDNDECODE, 1},
+  { "idn_decode",	DT_BOOL, R_MENU, OPTIDNDECODE, 1},
   /*
   ** .pp
   ** When \fIset\fP, Mutt will show you international domain names decoded.
   ** Note: You can use IDNs for addresses even if this is \fIunset\fP.
   ** This variable only affects decoding. (IDN only)
   */
-  { "idn_encode",	DT_BOOL, R_BOTH, OPTIDNENCODE, 1},
+  { "idn_encode",	DT_BOOL, R_MENU, OPTIDNENCODE, 1},
   /*
   ** .pp
   ** When \fIset\fP, Mutt will encode international domain names using