Toggle for invalidating downloads on startup.

[Sadwhy]

Describe your suggested feature

Basically what the title says but instead of invalidating both anime and manga on start up. It only invalids one or both that you select. If that's possible.

Other details

No response

Acknowledgements

• I have searched the existing issues and this is a new ticket, NOT a duplicate or related to another open or closed issue.
• I have written a short but informative title.
• If this is a request regarding an extension, I should be opening an issue in the extension's repository.
• I have updated the app to version 0.16.4.3.
• I will fill out all of the requested information in this form.