Add buttons to manage symbol pairs in Configuration page

[cj4c0b1]

Feature Request

In the Configuration page, under the Symbols tab, add two new buttons:

1. Add All Pairs: A button that fetches and adds all available pairs from the connected exchange to the configuration.

2. Clear All Pairs: A button that removes all currently selected pairs from the configuration.

Details:

• These buttons should be placed in the Symbols tab of the Configuration page.
• The 'Add All Pairs' button should integrate with the exchange API to retrieve all available trading pairs and add them to the list.
• The 'Clear All Pairs' button should provide a confirmation dialog to prevent accidental clearing.
• Ensure that these actions update the configuration state and persist the changes.

Benefits:

• Improves user experience by allowing quick population of all available pairs.
• Provides an easy way to reset the symbol configuration.

Implementation Notes:

• Review the existing exchange API integration for fetching pairs.
• Update the UI components in the Symbols tab accordingly.
• Add appropriate error handling and loading states.