Improve sorting of attachments with numbers in the title

Steps to replicate

1. Create a new page
2. Insert Attachments Macro
3. Save page
4. Upload files (such as PDF or DOC) in the page by 'drag and drop' with the file name:
   • 6 Six.pdf
   • 7 Seven.pdf
   • 8 Eight.pdf
   • 9 Nine.pdf
   • 10 Ten.pdf
   • 11 Eleven.pdf
5. Sort the Attachments Macro by File name Ascending

Observed behaviour
The attachments list will have the following sequence:

10 Ten.pdf
11 Eleven.pdf
6 Six.pdf
7 Seven.pdf
8 Eight.pdf
9 Nine.pdf

Expected Behaviour
The attachments list should have the following sequence:

6 Six.pdf
7 Seven.pdf
8 Eight.pdf
9 Nine.pdf
10 Ten.pdf
11 Eleven.pdf

Workaround
Leading zeroes (e.g. 06) can be used to make alphabetical order work correctly. In other words, while 6 is larger than 10 in alpahabetical order, 06 is smaller than 10.