Fix repeating of persistent parameter in url

[Rixafy]

When loading clean page with datagrid and persistent parameter included in router url, datagrid js always updated url and added redundant persistent parameter, for isntance:

url where example.com is persistent parameter domainName => http://localhost/domain/example.com/cron-task would turn into http://localhost/domain/example.com/cron-task?domainName=example.com because datagrid js has no way of knowing that there is already that persistent parameter.

In that case, my solution checks for /example.com in url, and if it's there, it skips that parameter while building url query, I think it's good enough when there is persistent parameter standalone somewhere in url.

[radimvaculik]

@Rixafy Have you tested with multiple parameters with same value, but different key? For example domainName1=example.com&domainName2=example.com

[Rixafy]

@radimvaculik I cannot replicate that, when I try to accept $test, in actionDefault(string $test), and then I add ?test=example.com in url, datagrid will ignore that test parameter for some reason, and it will apply only domainName persistent parameter and grid-* parameters.

Anyway, I improved the checking if this happened, after every check it will remove that /example.com from checked url, and next parameter will be checked on modified url string, this will work when persistent parameter will be placed before the get parameters in that map, but I have no way of testing if it's the case, since it ignored my ?test=example.com completely and it modified url without that parameter, so when I reloaded the page, I got 404.