* meson: Add support for libmutter-7 in the build system
This commit only adds support within the build system, no further attempt to make it build has been tried.
* mutter: Update the .vapi for libmutter-7
* Fix vapi syntax
* Make it work with mutter-7
* Re-enable PIP plugin
* Fix screenshot code
* Fix type
* Cleanup workspaces sooner
So we don't see the workspace removed animation on login
Co-authored-by: Cassidy James Blaede <cassidy@elementary.io>
Co-authored-by: David Hewitt <davidmhewitt@gmail.com>
