Lock menu & sync menu

[NohWayJose]

Sorry, I'm being lazy and putting two related feature requests in one issue.

1. In Player's drop down menu please add a toggle to lock the menu, so long press will no longer move an item to or from the Archive folder
2. In settings, add a check box to make the menus for all the players the same, based on selection from a drop down to choose which player to use as the template. Also, check box for lock menus, so further edits are blocked. If lock is off but menu sync is on, edits to one becomes edits to all. If lock is on and sync is on, no changes are permitted. Turning sync off (grey out the dropdown) means subsequent edits are only applied to the currently selected player