`FeedbackDialog` triggers multiple times upon en exception in RESTComponent

[drew2a]

Describe the bug There is something wrong with the implemented

• 7699

To Reproduce Steps to reproduce the behavior:

1. Go to RESTComponent and write raise ValueError on line 113:

       rest_manager = RESTManager(config=config.api, root_endpoint=self.root_endpoint, state_dir=config.state_dir)
       raise ValueError
       await rest_manager.start()

2. Run Tribler
3. Wait

Expected behavior It should fire FeedbackDialog once.

Screenshots

Desktop (please complete the following information):

• OS: macOS
• Tribler's version: https://github.com/Tribler/tribler/commit/035bab82fdf863bff8d1ea81c30dbdc4aeabb3d1