Frequently we add photos to a given folder after taking new photos, adding photos editted by other programs, etc. We update the catalog using the "synchronize folder" option. Please add a command and associated keyboard binding to "Synchronize last folder again", that uses the most recently sync-ed folder as the target folder to resync. This avoids the need and wasted time to manually find and select the folder.
Current workaround
Go to the Library>Folders selection, Navigate to the folder and select "synchronize folder"