oh-colorpicker: Replace defaultColor option with an actual default color

[florian-h05]

Remove the defaultColor option.
Instead use RGB(0,0,0) black as default color if the Item state holds no valid color, so that the color picker is accessible.

[relativeci]

Job #1347: Bundle Size — 15.84MiB (+0.52%).

2b4aba6(current) vs b7270d2 main#1158(baseline)

Important

Bundle introduced 1 and removed 1 duplicate package – View changed duplicate packages

Warning

Bundle introduced 13 new packages: @jsep-plugin/regex, @jsep-plugin/arrow, @jsep-plugin/object and 10 more – View changed packages

Bundle metrics   10 changes 5 regressions 1 improvement

	Current Job #1347	Baseline Job #1158
Initial JS	1.9MiB(+13.82%)	1.67MiB
Initial CSS	609.81KiB(+0.15%)	608.89KiB
Cache Invalidation	93.81%	93.95%
Chunks	217(-0.91%)	219
Assets	683(-0.87%)	689
Modules	3036(+78.59%)	1700
Duplicate Modules	170(+88.89%)	90
Duplicate Code	1.6%(-17.95%)	1.95%
Packages	152(+10.14%)	138
Duplicate Packages	16(+6.67%)	15

Bundle size by type   3 changes 3 regressions

	Current Job #1347	Baseline Job #1158
JS	9.31MiB (+0.6%)	9.25MiB
Other	4.75MiB (+0.53%)	4.73MiB
CSS	861.35KiB (+0.22%)	859.49KiB
Fonts	526.1KiB	526.1KiB
Media	295.6KiB	295.6KiB
IMG	140.74KiB	140.74KiB
HTML	1.23KiB	1.23KiB

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View job #1347 report View florian-h05:oh-colorpicker branch activity

[stefan-hoehn]

I agree with this approach as I think the default color is nothing really important and it makes the code simpler.

I have pulled the code and tested it and it works fine.
Code looks good to me.

Thanks, Florian, for fixing this as this was really a pain for me ;-)