Fixed removing of a collection item 

The affected line leads to a removal of the entire collection 
including the label.

This is just a quick fix until the functionality has been revised.
Fixes #370
 
Update Resources/doc/3-form-extension-templates.md

text more readable
Merge pull request #387 from Llyr/patch-1

Update Resources/doc/3-form-extension-templates.md
Merge pull request #372 from peterrehm/patch-2

Fixed removing of a collection item