Fixed some errors with double memory free (from 'menuitems' and from 'commands').
Added the four main commands for the editor of sprites (close_editor, make_unique_editor, split_editor).
Removed jmanager_dispatch_draw_messages.
Fixed wheel behavior in the editor (only when the editor is in standby state).
Replaced scare/unscare_mouse jmouse_hide/show. Renamed ji_mouse -> jmouse.
Added command_execute_close_file