Automatically set m5 to 2 when remix deck pages are open

[dotherightthing]

Currently it's passed but not used

When reverse is engaged on remix deck, focus deck action is triggered

Pass deck value with page navigation (Ch.11.CC.90)

// pd=0 = Deck A
// pd=42 = Deck B
// pd=84 = Deck C
// pd=127 = Deck D

[dotherightthing]

But consider that there would need to be a state which is 'auto', ie don't change the value from what it was

[dotherightthing]

Started with 7bbc580