Adds alpha option to multicolor control

[danielortiz]

ref #1321
I also needed this, so I implemented it.

One difference from the color control is that it passes the alpha argument inside the choicesarg, like

'choices' => array(
    'alpha' => true,
),

but as multicolor is already using 'choices' arg for color options, I put it on the $args root. Just let me know if you have a better idea.

Another difference from color control is that alpha is disabled by default there. That's a case where one would have to choose between consistency and legacy support. I've chosen legacy here and set it as enabled by default, let me know if you think it should be the opposite.

[AdsonCicilioti]

Good feature!

Hey @danielortiz !

We need to help @aristath take the kirki to an even better level than it already is. But I have a small level in PHP.

I have felt limitations in using the repeater, as I see it as a very powerful field, but limited because it does not yet support all of Kirki's fields.

But I believe that with a few lines of code we can do it, for example, to enable the multicolor field ... The color field, for example, does not accept the alpha skill inside a repeater. These and other adjustments could make Kirki's repeater a Rocket!

[danielortiz]

Hi, @AdsonCicilioti. I'm not really familiar with the repeater control, but sure, I can take a look :), and yea, I see it'd be useful.

Something that I DID need was a reorderable repeater.

[aristath]

Hey there!

I haven't had a chance to review this yet, I'll do it later today.

As for the repeater, the rows ARE sortable 😄

[danielortiz]

@aristath really? that's great..I didn't actually test it and I assumed they weren't looking at the screenshot..sorry

[aristath]

Merged 👍