Description:
The OnionShare desktop application lacks a back button, which makes navigation between different screens less unintuitive. This can be frustrating for users who expect a more seamless navigation experience.

Steps to Reproduce:
Open the OnionShare application.
Select any feature (e.g., "Share Files").
Try to return to the main menu or select a different feature directly.
Observe that there is no "Back" button or quick navigation option.
Proposed Solution:
Add a "Back" button on each feature screen (e.g., Share Files, Receive Files, Host a Website, Chat Anonymously) to allow users to return to the main menu quickly and intuitively. This would align with common usability practices and improve user control.

Severity:
Moderate – While the current interface is functional, the lack of a back button may frustrate users and lead to inefficient workflows, especially for first-time users.

Additional Context:
This issue was identified as part of a heuristic evaluation of the application, using Jakob Nielsen's 10 Usability Heuristics. Specifically, it relates to the heuristic of "User Control and Freedom," as users lack a quick and intuitive way to undo their actions or navigate between screens.

Let me know if you want to add more details or adjust anything!