[BUG] Disable Alpha is not hidding alpha/transparency field in widget

[galexrt]

Describe the bug
A clear and concise description of what the bug is.

To Reproduce
Steps to reproduce the behavior:

1. Create a ColorPicker with disableAlpha set on it https://aesoper101.github.io/vue3-colorpicker/?path=/story/example-colorpicker--disable-alpha
2. Click on "hex" so that the "rgba" mode is enabled.
3. The text "rgba" is shown and the transparency field can be modified. To note the format of the returned pureColor seems to be correct at least for hex format.

Expected behavior

I expect that when I pass disableAlpha to the component the text rgba -> rgb and the transparency/fourth field is not shown to the user.

Screenshots

Additional context

A "hacky workaround" is to hide the toggle completely, though it restricts users to enter hex codes only.

.vc-input-toggle {
    display: none !important;
}