io/input,io/key: [API] replace SoftKeyboardOp with a command

Signed-off-by: Elias Naur <mail@eliasnaur.com>

internal/ops/ops.go

@@ -69,7 +69,6 @@ const (
 	TypeTarget
 	TypeOffer
 	TypeKeyInput
-	TypeKeySoftKeyboard
 	TypeSave
 	TypeLoad
 	TypeAux
@@ -153,7 +152,6 @@ const (
 	TypeTargetLen           = 1
 	TypeOfferLen            = 1
 	TypeKeyInputLen         = 1 + 1
-	TypeKeySoftKeyboardLen  = 1 + 1
 	TypeSaveLen             = 1 + 4
 	TypeLoadLen             = 1 + 4
 	TypeAuxLen              = 1
@@ -435,7 +433,6 @@ var opProps = [0x100]opProp{
 	TypeTarget:           {Size: TypeTargetLen, NumRefs: 2},
 	TypeOffer:            {Size: TypeOfferLen, NumRefs: 3},
 	TypeKeyInput:         {Size: TypeKeyInputLen, NumRefs: 2},
-	TypeKeySoftKeyboard:  {Size: TypeKeySoftKeyboardLen, NumRefs: 0},
 	TypeSave:             {Size: TypeSaveLen, NumRefs: 0},
 	TypeLoad:             {Size: TypeLoadLen, NumRefs: 0},
 	TypeAux:              {Size: TypeAuxLen, NumRefs: 0},
@@ -511,8 +508,6 @@ func (t OpType) String() string {
 		return "Offer"
 	case TypeKeyInput:
 		return "KeyInput"
-	case TypeKeySoftKeyboard:
-		return "KeySoftKeyboard"
 	case TypeSave:
 		return "Save"
 	case TypeLoad: