Fixed issue # 16824: Quota : Back to the previous page, one click is not recognized, you need to click again (#1676)

In LS3, the 'hidden' attribute is only stored if it's set to 1. But, in LS4, the attribute is always in the table (set to 0 by default).
Since the code was not checking for the value, $bAllHidden was always 'true' in LS4.