The MaxMix device should wake up when editing rgb colors on the app

[maelremrem]

Guidelines

• I have reviewed the guidelines for contributing to this repository.

Is your feature request related to a problem? Please describe.
Is the device is in sleep you can see the colors when you edit them in the app.

Describe the solution you'd like
When the app is open the device or at least the leds should be on to see the new colors.

Describe alternatives you've considered
Wake up the device but turning the encoder

[SchemingWeasels]

RGB is not part of the settings message. I think we should include it in. But either way, it will have to wait for comms rework.

Edit: RGB is in settings. ProcessPackage returning true does not update activity time. Was dropped somewhere.

[XScorpion2]

In MaxMix.ino, change this:

    g_DisplayDirty = (command >= Command::SETTINGS || command <= Command::VOLUME_ALT_CHANGE);
    if (command == Command::CURRENT_SESSION || command == Command::ALTERNATE_SESSION ||
        command == Command::VOLUME_CURR_CHANGE || command == Command::VOLUME_ALT_CHANGE)
    {
        g_LastActivity = g_Now;
        g_DisplayDirty = true;
    }

To this:

    if (command >= Command::SETTINGS || command <= Command::VOLUME_NEXT_CHANGE)
    {
        g_LastActivity = g_Now;
        g_DisplayDirty = true;
    }