improve UI displaying

* update text in clear expression
* always show a type of testing URL in preset
* rename a key |copy| to |special|, functional to characteristic
*
contain only URL in item data

* remove a |action| key from the common data because handling actions can work
  well in function of making menuitems
send only URL string to item data array
rewrite grouping of separated URLs
remove wrong bracket at commit: 912d353
add option for general schemes
make compatible URL warning for same page and special scheme
support detecting '+-.' characters in URL scheme