[SEARCH] Remove the 32 characters' limitation on size of the regex group names

[svlad-90]

It would be good to remove the 32 characters' limitations on size of the regex group names. It should be possible to do that via internal mapping of provided group names to some shorter identifiers, e.g. counter-based ones - 1, 2, 3, 4, etc. Short identifiers would be actually used within the regex, while long names would be still known to the plugin's implementation.