Problem description: Trailing and lieading spaces are not trimmed in Name => Value pair fields in Web scenario and Web scenario step configuration forms. List of such fields:
Web scenario => Variables (trailing/leading spaces not trimmed in Value field)
Web scenario => Headers
Web scenario step => Query fields
Web scenario step => Post fields
Web scenario step => Variables (trailing/leading spaces not trimmed in Value field)
Web scenario step => Headers

Steps to reproduce:

1. Open the list of web scenarios of any host
2. Click on the "Create web scenario" button
3. Fill in Web scenario name and add values with trailing and leading spaces in the following fields:
   Web scenario => Variables => Name
   Web scenario => Variables => Value
   Web scenario => Headers => Name
   Web scenario => Headers => Value
4. Open "Steps" tab and press "Add" button in "Steps" field
5. In the opened dialog populate Step name and URL and add values with trailing and leading spaces in the following fields:
   Web scenario step => Query fields => Name
   Web scenario step => Query fields => Value
   Web scenario step => Post fields => Name
   Web scenario step => Post fields => Value
   Web scenario step => Variables => Name
   Web scenario step => Variables => Value
   Web scenario step => Headers => Name
   Web scenario step => Headers => Value
6. Save step configuration
7. Save Web scenario configuration
8. Open created web scenario and check trailing and leading spaces in all of the above mentioned fields.

Result: trailing and leading spaces were trimmed only in Variables => Name field in Web scenario and Web scenario step configuration forms
Expected: suggestion is to trim trailing and leading spaces in all of the above mentioned fields.