fix up backspace/delete binding widgets and fix a related mistake in the terminator_config manpage

doc/terminator_config.5

@@ -66,7 +66,7 @@ Default value: \fBascii\-del\fR
 .TP
 .B delete_binding
 Sets what code the delete key generates. Possible values are "ascii-del" for the ASCII DEL character, "control-h" for Control-H (AKA the ASCII BS character), "escape-sequence" for the escape sequence typically bound to backspace or delete. "escape-sequence" is normally considered the correct setting for the Delete key.
-Default value: \fBdelete\-sequence\fR
+Default value: \fBescape\-sequence\fR
 .TP
 .B cursor_blink \fR(boolean)
 Controls if the cursor blinks.

terminatorlib/prefs_profile.py

@@ -75,6 +75,18 @@ class ProfileEditor:
         widget.append_text ('right')
         widget.append_text ('disabled')
         widget.set_active (0)
+      elif key == 'backspace_binding':
+        widget = gtk.combo_box_new_text()
+        widget.append_text ('ascii-del')
+        widget.append_text ('control-h')
+        widget.append_text ('escape-sequence')
+        widget.set_active (0)
+      elif key == 'delete_binding':
+        widget = gtk.combo_box_new_text()
+        widget.append_text ('ascii-del')
+        widget.append_text ('control-h')
+        widget.append_text ('escape-sequence')
+        widget.set_active (2)
       elif key == 'focus':
         widget = gtk.combo_box_new_text()
         widget.append_text ('click')