Only show amount of comments when there are comments, thus no (0)

[Comoque1]

As a user, I don't like seeing (0) everywhere, as an admin posting closed posts, I don't want to show (0). Locations:

• [ ] Knowledge base (Space)
• [ ] Subspace > Index
• [ ] Innovation flow settings/manage innovation flow drag and drop thing
• [ ] Sort contributions dialog

To Reproduce Steps to reproduce the behavior:

1. Go to https://dev-alkem.io/testcalloutsorder/knowledge-base
2. Click on "menu"
3. Click on "sort contributions" - all posts have (0) as postfix

Expected behavior Only posts with comments get a postfix with the amount of omments