Hi

@Lejun thx for your feedback :-)
These are my first contributions, glad to learn from you.

- First point, I will remove the name on the sidewalk and use Relation:associatedStreet. I wanted to apply the instructions
- Second point, I just want to indicate the level of accessibility for wheelchairs. On your recommendation I will clean the useless tags
- for the 3rd point, it is an error to be corrected for a single polygon