Livetable parameters cannot be recovered with URI encoding

Livetable uses the fragment/hash of the URL to store the filtering (and sorting) configuration since XWIKI-4921. The implementation assumes that | is left untouched in the fragment. Unfortunately, there are URL parser implementations (like Java's URI) that insist on encoding | as %7C. The same happens under Linux when using xdg-open to open a URL. This is due to differences between the original URI/URL specification and the WHATWG URL standard that is implemented by browsers.

Livetable should recover the configuration even after | has been replaced by %7C. This is possible because Livetable configurations always start with |t=, which doesn't occur anywhere else inside the configuration as then = would have been encoded, too. It is thus possible to fix the hash of the location by replacing %7Ct= by |t= before the configuration is parsed.