Deletion modal of Linodes/NodeBalancers/Domains require user confirmation input

[phuegel]

1. On Deletion modal of Linodes/NodeBalancers/Domains ADD either a confirmation checkbox or an "I agree" text input box as required input before allowing the destructive "Delete" action to take place.

Option #1:
[x] Yes, remove this Linode from my account.

Option #2:
This action will permanently remove this Linode from your account.
Type "I agree" to confirm [ I agree ]

2. Add the following warning disclosure to all destructive action modals:

"This operation cannot be undone."

[eatonphil]

Could you mention this here #1890 instead?

[phuegel]

Dup of #1890