Issue #1883412 by asgorobets: Integrate Menu Slice sandbox project into Menu Clone.
Removed t() from hook_menu
Fixed [#1677272] Changing language with menu_clone does not work - fixed help text for i18n_menu
Some code formatting fixes
Added comment concerning 'expanded' checkbox in D7
Fixed [#1677134] Creating a clone of a clone: no menu items on edit form...
Fixed [#1179018] Notice: Undefined index: title in menu_clone_load()
Fixed links in help text to D7 links :-s
New port from the D6 version, started from scratch. What the hell happened here? The most important stuff was dropped by the previous porter!?
