Previously it would only change the color of the ColorWidget itself,
but not make it the primary/secondary color. I think it feels nicer
this way, if I'm adding a color to the palette I likely want to use
it.
If you *really* need to only change the color of the palette, you
can just Ctrl+Middle click.
Previously, if you wanted to use a custom color, the only way to
do so was to first Ctrl+click on one of the pallette colors, which
would just change that palette item. Then, you would need to
manually click on that color.
Now, you can just click on the preview of the primary/secondary
color to open up the picker and only temporarily use the new color
without affecting the palette at all.
The height of the bottom color container was cut off at the bottom.
This adjusts the heights and also the primary/secondary color
widget so that it's in line.
Color palettes can now be stored in and read from files. The default
palette will be read from `/res/color-palettes/default.palette`
instead of being hard-coded in PaletteWidget.
The file format is one color per line, in any format that can be
understood by `Gfx::Color::from_string`.
SPDX License Identifiers are a more compact / standardized
way of representing file license information.
See: https://spdx.dev/resources/use/#identifiers
This was done with the `ambr` search and replace tool.
ambr --no-parent-ignore --key-from-file --rep-from-file key.txt rep.txt *
