Drum Input Palette should not automatically open in note input mode

When you enter note input mode on a percussion staff, the Drum input palette (DIP) automatically opens. But the best way to enter drum notation is through an external MIDI keyboard or the virtual piano keyboard—and these don't need the DIP at all. You only need the DIP if you wish to enter notes directly from it or to remind you about shortcuts (but advanced users may be able to recall the latter from memory).

IMV, the best default behaviour is for the DIP not to automatically open when note input mode is engaged. Instead, provide an option for the user to tick if they want it to open (in "View"?): if unchecked, the DIP will always stay hidden.