This change introduces a new EditorThemeManager class
to abstract theme generatio and its subroutines.
Logic related to EditorTheme, EditorColorMap, and editor
icons has been extracted into their respective files with
includes cleaned up.
All related files have been moved to a separate folder to
better scope them in the project. This includes relevant
generated files as well.
This removes the immediate confirmation dialog and insteads prints the
message to the editor log (and it also appears as a toast). The immediate dialog
is a devil's plaything, and it cannot be used in this scenario (if it can be used
anywhere at all). The condition that triggers the SUT can happen during any
attempt by the rendering server to read a mesh. This means it will conflict
with a number of editor processes, like loading, importing, preview
generation, export, CLI mode, etc.
So while this is less on the nose as far as informing users goes, it's also
our best option to use the log and the toaster.
This defers the update to a fresh restart of the editor (to ensure we aren't mid way through loading scenes anymore.
It also ensures that the popup can't be used by multiple threads at once
Co-authored-by: Yuri Sizov <yuris@humnom.net>
