ZeroNet Notification Banners difficult to click on mobile Firefox

### Step 1: Please describe your environment

* ZeroNet version: 0.6.0
* Operating system: Android 8.1
* Web browser: Firefox

Same problem as [zeronet.io/#28](https://github.com/HelloZeroNet/zeronet.io/issues/28) which has now been fixed. Same fix may be required.

### Steps to reproduce:

* On ZeroHello, click a ⋮ character next to a ZeroNet site and hit 'delete'.
* A confirmation notification will appear. Try to hit Delete button on the notification.
* Find that `:hover` state is activated, and the button lights up, but you can never actually press it.
* Site is never deleted.

Thanks!

Start by reproducing the deletion confirmation notification in ZeroHello on Android Firefox and compare its behavior with the linked zeronet.io issue. Identify the notification's mobile interaction handling and verify that the Delete button can be pressed and the site is removed.

索引モデルが issue の本文から書いたものです。