api "monocastMessage" "broadcastMessage" updated,

add "sender" key.
add sender key
add reactor keys & api "setReactor" view dictioany add keys.
fix api "collectView" bug.

new and delete
FocusdMode fix!

->no limit of filepath yet.
->FolderMode doesn't fix yet.
->no RecursiveMode yet.
->no change-mode interface.