Fix the default backlighting string

  This makes plain text and spaces have the same backlight, a little paler than
  the default background (when backlighting is enabled, of course).

  It also makes this resource saveable to the settings file.

diff -ur nedit_official/doc/help.etx nedit_mod/doc/help.etx
--- nedit_official/doc/help.etx	2004-12-23 17:25:44.000000000 -0500
+++ nedit_mod/doc/help.etx	2005-01-27 10:58:40.151406000 -0500
@@ -4289,7 +4289,7 @@
 
   Color for hyperlinks in the help text
 
-**nedit.backlightCharTypes**:  0-8,10-31,127:red;9:#dedede;32,160-255:#f0f0f0;128-159:orange
+**nedit.backlightCharTypes**:  0-8,10-31,127:red;9:#dedede;32-126,160-255:#f0f0f0;128-159:orange
 
   **NOTE: backlighting is ~experimental~** (see "Programming_with_NEdit_").
 
diff -ur nedit_official/source/preferences.c nedit_mod/source/preferences.c
--- nedit_official/source/preferences.c	2004-12-23 17:25:45.000000000 -0500
+++ nedit_mod/source/preferences.c	2005-01-27 10:58:01.163685000 -0500
@@ -764,7 +764,7 @@
     {"backlightChars", "BacklightChars", PREF_BOOLEAN, "False",
       &PrefData.backlightChars, NULL, True},
     {"backlightCharTypes", "BacklightCharTypes", PREF_ALLOC_STRING,
-      "0-8,10-31,127:red;9:#dedede;32,160-255:#f0f0f0;128-159:orange",
+      "0-8,10-31,127:red;9:#dedede;32-126,160-255:#f0f0f0;128-159:orange",
     /*                     gray87                 gray94                 */
-      &PrefData.backlightCharTypes, NULL, False},
+      &PrefData.backlightCharTypes, NULL, True},
     {"searchDialogs", "SearchDialogs", PREF_BOOLEAN, "False",
     	&PrefData.searchDlogs, NULL, True},
     {"beepOnSearchWrap", "BeepOnSearchWrap", PREF_BOOLEAN, "False",