The File Selection Dialog at the web GUI gets out of sync

[martinvahi]

In stead of scanning the disk for file system changes at the moment, when the file selection dialog is opened, the disk is scanned for file system changes only when the web application page at the web-browser is reloaded (by pushing the F5 button).

The result is that new WARC-files that are created after the web application has been launched, are not visible at the file selection dialog. People, who are new to the application do not necessarily expect that they have to refresh the whole web page to see the updates.