Add option to show scale degrees for tokens without attack

[WolfgangDrescher]

test.krn:

**kern	**kern	**kern	**kern
*part4	*part3	*part2	*part1
*staff4	*staff3	*staff2	*staff1
*clefF4	*clefGv2	*clefG2	*clefG2
*k[f#c#g#d#]	*k[f#c#g#d#]	*k[f#c#g#d#]	*k[f#c#g#d#]
*E:	*E:	*E:	*E:
*M3/4	*M3/4	*M3/4	*M3/4
=33	=33	=33	=33
4E	4G#	4e	4e
4r	4r	4.e	4r
4r	4r	.	4r
.	.	8e	.
=34	=34	=34	=34
2.r	4r	[2.e	2.r
.	4.dn	.	.
.	8d	.	.
=35	=35	=35	=35
2.r	(2.dn	2e_	4r
.	.	.	4.cc#^
.	.	8e]	.
.	.	8e	8b
=36	=36	=36	=36
4r	2c#)	2e	(4a
4.AA	.	.	4g#)
.	4A	4c#	4f#
8AA	.	.	.
=37	=37	=37	=37
2.AA	2.A	2.c#	2.e
=38	=38	=38	=38
2EE; 2E	2G#;	2B;	2e;
4ryy	4ryy	4ryy	4ryy
==	==	==	==
*-	*-	*-	*-

Before:

**kern	**deg	**kern	**deg	**kern	**deg	**kern	**deg
*part4	*	*part3	*	*part2	*	*part1	*
*staff4	*	*staff3	*	*staff2	*	*staff1	*
*clefF4	*	*clefGv2	*	*clefG2	*	*clefG2	*
*k[f#c#g#d#]	*	*k[f#c#g#d#]	*	*k[f#c#g#d#]	*	*k[f#c#g#d#]	*
*E:	*E:	*E:	*E:	*E:	*E:	*E:	*E:
*M3/4	*	*M3/4	*	*M3/4	*	*M3/4	*
=33	=33	=33	=33	=33	=33	=33	=33
4E	1	4G#	3	4e	1	4e	1
4r	r	4r	r	4.e	1	4r	r
4r	r	4r	r	.	.	4r	r
.	.	.	.	8e	1	.	.
=34	=34	=34	=34	=34	=34	=34	=34
2.r	r	4r	r	[2.e	1	2.r	r
.	.	4.dn	7-	.	.	.	.
.	.	8d	7-	.	.	.	.
=35	=35	=35	=35	=35	=35	=35	=35
2.r	r	(2.dn	7-	2e_	.	4r	r
.	.	.	.	.	.	4.cc#^	6
.	.	.	.	8e]	.	.	.
.	.	.	.	8e	1	8b	5
=36	=36	=36	=36	=36	=36	=36	=36
4r	r	2c#)	6	2e	1	(4a	4
4.AA	4	.	.	.	.	4g#)	3
.	.	4A	4	4c#	6	4f#	2
8AA	4	.	.	.	.	.	.
=37	=37	=37	=37	=37	=37	=37	=37
2.AA	4	2.A	4	2.c#	6	2.e	1
=38	=38	=38	=38	=38	=38	=38	=38
2EE; 2E	1 1	2G#;	3	2B;	5	2e;	1
4ryy	r	4ryy	r	4ryy	r	4ryy	r
==	==	==	==	==	==	==	==
*-	*-	*-	*-	*-	*-	*-	*-

After: (degx test.krn --resolve-null)

**kern	**deg	**kern	**deg	**kern	**deg	**kern	**deg
*part4	*	*part3	*	*part2	*	*part1	*
*staff4	*	*staff3	*	*staff2	*	*staff1	*
*clefF4	*	*clefGv2	*	*clefG2	*	*clefG2	*
*k[f#c#g#d#]	*	*k[f#c#g#d#]	*	*k[f#c#g#d#]	*	*k[f#c#g#d#]	*
*E:	*E:	*E:	*E:	*E:	*E:	*E:	*E:
*M3/4	*	*M3/4	*	*M3/4	*	*M3/4	*
=33	=33	=33	=33	=33	=33	=33	=33
4E	1	4G#	3	4e	1	4e	1
4r	r	4r	r	4.e	1	4r	r
4r	r	4r	r	.	1	4r	r
.	r	.	r	8e	1	.	r
=34	=34	=34	=34	=34	=34	=34	=34
2.r	r	4r	r	[2.e	1	2.r	r
.	r	4.dn	7-	.	1	.	r
.	r	8d	7-	.	1	.	r
=35	=35	=35	=35	=35	=35	=35	=35
2.r	r	(2.dn	7-	2e_	.	4r	r
.	r	.	7-	.	.	4.cc#^	6
.	r	.	7-	8e]	.	.	6
.	r	.	7-	8e	1	8b	5
=36	=36	=36	=36	=36	=36	=36	=36
4r	r	2c#)	6	2e	1	(4a	4
4.AA	4	.	6	.	1	4g#)	3
.	4	4A	4	4c#	6	4f#	2
8AA	4	.	4	.	6	.	2
=37	=37	=37	=37	=37	=37	=37	=37
2.AA	4	2.A	4	2.c#	6	2.e	1
=38	=38	=38	=38	=38	=38	=38	=38
2EE; 2E	1 1	2G#;	3	2B;	5	2e;	1
4ryy	r	4ryy	r	4ryy	r	4ryy	r
==	==	==	==	==	==	==	==
*-	*-	*-	*-	*-	*-	*-	*-