Update default limits to more sensible values

[loevgaard]

I have been annoyed by these default limits multiple times - maybe others have as well? :-)

[Roshyo]

What do you think of having rather a config for defining all grids at once ?

Like:

sylius_grid:
    default_grids_limits: [50, 100, 200]

And then the individual grid definition would override this.
The thing is that the limits you consider as "more sensible" may not be the same for everyone.