Do not save a technology setting if the value has not changed

[omar-chahbouni-decathlon]

Describe the bug Even though the value to update has not changed, the setting (or technology setting) line is either added (same as default value) or "updated".

To Reproduce Steps to reproduce the behavior:

1. Go to 'Manage Project'
2. Click on either 'TECHNOLOGIES' or 'SETTINGS'
3. Click on the edit button
4. Click on save (without changing the value)

Expected behavior

• client: If the value hasn't changed, the save button should be disabled (for 'TECHNOLOGIES' and 'SETTINGS').
• server: If the value is the same as in the setting do not save it. Idem, if the value is not found in the setting but is the same as the default value.