[Feature request] add a close button to the popup window

[sinancetinkaya]

Checklist

• I have searched for existing issues (open and closed) and confirmed this feature hasn't been requested before
• I believe this feature request will benefit more than 10% of users, not just myself

Feature Description

I searched close button through the issues and couldn't find one.
I mostly use PipePipe as a popup player. I send youtube links to PipePipe via web browser's share menu.
Please add a close button to the popup window. Currently the only way to to close the popup window is to drag the window all the way to the bottom of the screen or Android's status bar.