Check if we're in a VM

[cassidyjames]

Fixes #323

• Update copyright date while we're here
• Add a check to see if we're in a VM based on cpuinfo flags
• Change enough_power to minimum_specs to reduce confusion
• Move encrypt_view to its logical place in MainWindow.vala
• Revert a lot of the check view magic as it appears to be broken with multiple conditions (i.e. on battery and in a VM)

Screenshot from my VM:

Ready for review.

[cassidyjames]

I think there's a better way of checking that through CPU kernel flags file… There's a hypervisor flag in /proc/cpuinfo when we're running on a VM
–@donadigo

[cassidyjames]

Confirmed to work in VirtualBox here, should probably double-check other VM software for sanity.

[cassidyjames]

Spinning up a VMware machine for testing, though with the distinst changes that might be difficult.

[cassidyjames]

Confirmed to work in VMware. Now the only problem I see:

• only loads when the user chooses a clean install, but not a custom partition

[cassidyjames]

Fixed the previous comment, but it feels a little dirty. Help/input welcome! 😁

[jeremypw]

@cassidyjames Converting to draft as labelled "In Progress", has conflicts, and no recent progress.

[cassidyjames]

Closing in favor of #625