Rudimentary lock system that allows one user at a time to make writes to documents and blocks any writes which do not come from this user.
Locks are automatically acquired on mount/unmount for glam.client.ui.document.document/Document. This is not a satisfactory solution and is just done as a stopgap in anticipation of its replacement with a different UI.
Closes #22. Changes:
glam.client.ui.document.document/Document. This is not a satisfactory solution and is just done as a stopgap in anticipation of its replacement with a different UI.