Web-UI file dialogs don't show files/dirs starting with dot '.'

Please describe what you are doing to trigger the bug:
Open any file dialog in the web UI. Trying to open a file/directory starting with ‘.’ or

Please describe what you expect to happen (but doesn’t):
The file selection dialog to show files/dirs starting with dot ‘.’

Please describe what actually happens (the wrong behaviour):
Files/dirs starting with dot ‘.’ are hidden from the file/dir list