Modernize color picker

[dongskyler]

Use a more modern approach for the color picker.

This will also address #35 Feature request: Auto-fill hex code of color picker.
Issue #35 was addressed by a separate PR.

[dongskyler]

Deemed the following color picker not suitable:
https://github.com/Simonwep/pickr

It can only initialize one instance at a time, and it cannot re-rendered dynamically.

Trying something else.

[dongskyler]

Resolution

I haven't found a good, modern, and suitable JS color picker to replace the current one.

For the time being, the current one will do the job.

I'm going to pause my effort on this issue.

Possible candidates

• https://github.com/taufik-nurrohman/color-picker
• There are many more

Summary of unviable color pickers

https://github.com/Simonwep/pickr

• Cannot initialize multiple color pickers
• Cannot dynamically re-render an existing color picker

https://github.com/PitPik/tinyColorPicker

• The last commit was 4 years ago, so I doubt it can dynamically re-render itself (JavaScript itself wasn't ready then)

[tangaw]

Sounds good.