Sort function - sort Title and Label decimal style, like book chapters (example given) instead of straight alpha-numerical

[Chris75forumname]

Sort function
Sort Title and Label fields (type text) in a decimal style, like book chapters (example given):

1 Test
2 Test
2.1 Test
2.2 Test
3 Test
...
10 Test
10.1 Test
11 Test

... instead of pure alpha-numerical sort, since alpha-numerical would require a trailing zero to achieve the expected sort order, but trailing zeros are not appropriate for Gantt-Chart notations.