File types are groups that can be switched to show / hide by search menu.
Name is used as the text of the menu item in the search menu.
! is displayed if the condition has a not condition.
Filename's pattern (regular expression) to toggle the visibility at once.
Double-click the item which you want to edit, you will get 'Search condition' dialog. Name, not condition and pattern can be edited by that.
Push to move selected items up in the list.
Push to move selected items down in the list.
Push to insert new item, filename pattern dialog will be opened.
Push to remove selected items in the list.
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