InputCommon: Use value of "Modifier" button "Range" setting rather than always applying 50%.

Make "Clear" button reset "Modifier" "Range" settings to 50%.

Source/Core/InputCommon/ControllerEmu/ControlGroup/Tilt.cpp

@@ -50,9 +50,7 @@ Tilt::ReshapeData Tilt::GetReshapableState(bool adjusted) const
   if (!adjusted)
     return {x, y};
 
-  const ControlState modifier = controls[4]->GetState();
-
-  return Reshape(x, y, modifier);
+  return Reshape(x, y, GetModifierInput()->GetState());
 }
 
 Tilt::StateData Tilt::GetState() const
@@ -76,4 +74,9 @@ ControlState Tilt::GetMaxRotationalVelocity() const
   return m_max_rotational_velocity.GetValue() * MathUtil::TAU;
 }
 
+Control* Tilt::GetModifierInput() const
+{
+  return controls[4].get();
+}
+
 }  // namespace ControllerEmu