SPDX License Identifiers are a more compact / standardized
way of representing file license information.
See: https://spdx.dev/resources/use/#identifiers
This was done with the `ambr` search and replace tool.
ambr --no-parent-ignore --key-from-file --rep-from-file key.txt rep.txt *
This commit puts all of the remaining pieces in place. This adds a
mechanism to update the text, title, and icon of an image. If an image
is not provided, the default ladybug will be shown.
This will allow us to later query the notifications from a connection
and safely update it without exposing it to any other applications, as
it is session based.
