fix: add button to reset assets manager settings

# Bug Report

## User Story
As a user, I want to reset assets manager settings for a site so that I can easily reconfigure the settings.

## Current Behavior
Currently, there is no option to reset assets manager settings.

## Expected Behavior
I expect to have a button to reset the assets manager settings.

## Bug Type
- [ ] Add a button to reset assets manager settings.
- [ ] Testing
