Prevent Outliner running twice when overwriting source

[Dave Stewart]

Background

When Outliner is set to overwrite source, it runs twice on each file:

• the first time; to update the file
• the second time; because the file changed, logging no-change, because the file has already been processed

Proposal

Fix:

• store a temporary cache of updated filenames when overwriting source
• prevent these from being added to the next watch batch
• remove after a specified time limit

Also:

• check if we really need to convert paths to absolute

Notes