Paradigms table enhancements

[egpbos]

In addition to #2, some more nice to haves:

• If you click on the number of lexica, corpora or paradigms, you get a list of which ones.
• It's not immediately clear from the interface that clicking a wordform makes it end up in the shopping cart. Maybe some kind of more explicit animation could be used for this (physically move the item to the cart icon maybe, you could do that only the first time to not overload on flashy graphics).
• It would be nice if you could filter, or manually reorder rows (grab them and move them up or down the list) so that you can more easily compare the statistics of selected wordforms.