Unable to mount DVDs with only Mouse

[comods]

Qubes OS version:

R4.0

Affected component(s):

dom0's taskbar widget Devices, cdroms, dvds, users of mainly Windows VMs, users who do not use the command line.

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Steps to reproduce the behavior:

In dom0's taskbar widget Devices (Yellow Icon), hover over your DVD drive, select to attach to (example: personal).
Open file application (example: Gnome Files).
Select "Other Locations" from side bar.
DVD drive is not displayed.

Expected behavior:

Able to mount DVDs with GUI.

• Keep security in mind, user chooses to auto mount.
• Only need the mouse.
• Do not need to track down temporary drive name. (Is it /dev/xvdi or /dev/xvdk?)
• Do not need to open the Terminal.
• When using GUI file manager like "Gnome Files" there is no need to track down auto-mount location /media/device1234 because it displays in "Other Locations".

I have three ideas:

1. In dom0's taskbar widget Devices (Yellow Icon), hover over your DVD drive, hover over target VM, new menu appears with Attach Unmounted, Attach Read-only Files, & Attach Read/Write Files, select Read-only, notification displays with <device as named in devices widget>, <vm-name>, Device: /dev/xvdi, & Files: /media/device1234.

2. In dom0's taskbar widget Devices (Yellow Icon), your DVD drive is listed more than once as (Unmounted), (Read-only Files), & (Read/Write Files), hover over Read-only, select target VM, notification displays with <device as named in devices widget>, <vm-name>, Device: /dev/xvdi, & Files: /media/device1234.

3. In dom0's taskbar widget Devices (Yellow Icon), hover over your DVD drive, select target VM, the following popup window displays, select Read-only.

This device can be auto-mounted for easy access to its files.
Select "Do not Mount" to manually mount device.
`<device as named in devices widget>`
`<vm-name>`
`Mountable device: /dev/xvdi`
`Will mount files here: /media/device1234`
[Do not Mount]    [Mount as Read-only]    [Mount as Read/Write]

         Note: If this feature was used for, say USBs, then if the USB device
         had multiple partitions, there would need to be a dropdown to select
         which partition, with a dropdown option to auto-mount all of them.

All three ideas do the following under the hood:

• Detect device name/uuid inside vm (example: /dev/xvdi).
• Detect /media/device<4 digits> folder name that is not in use (example: /media/device1234).
• sudo qvm-run --autostart --no-gui <vm-name> "sudo mkdir /media/device1234/"
• sudo qvm-run --autostart --no-gui <vm-name> "sudo mount /dev/xvdi /media/device1234/"
• If needed, Label device in a useful way.

Actual behavior:

In dom0's taskbar widget Devices (Yellow Icon), hover over your DVD drive, select to attach to (example: personal).
Manually find correct mountable /dev/xvdi, /dev/xvdk, etc.
Google where (Gnome Files) needs the drive mount at to be detected (/media/).
Manually make directory sudo mkdir /media/device1234
Manually mount sudo mount /dev/xvdi /media/device1234

General notes:

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Related issues:

#1117