Added a widget to create a menu with a choice of search filter.

Added a widget to create a menu with a choice of search filter. For example, for use on a general search results page that does not have a search filter set. The widget is created on the "My Blocks/Menu" page as a functional menu.

Added navigation by store categories to the "Slide Menu" Widget.
A widget is added with a falling side menu.
Added information about the new selected method of payment and delivery (Selected by the buyer).