Sorry for my english

in "items", if "type of information" = "text" - Clear history for selected item did`nt work.

If the type of data = "text" - that it is impossible to make "Clean history for selected items".
Possible problem: removal occurs only in table "history".
Possible fix: before clearing it is necessary to make check what type of data it is chosen (numeric, character, log, text), and to make clearing in the corresponding table.