The colour tab improvements

[Abelinoss]

So I would like the colours tab to be a bit more user friendly.

- A 'switch colours' button. To switch the the Base and Accent colours around

- A colour picker

- A hex code option

- A close button, instead of clicking "selection tool" or one of those

- An "undo 'set agency'" button

Feel free to comment on more changes / additions needed.

[MrZurkon]

It'd be nice if the undo button also applied to paintwork too.

[histalonia]

Would be nice to pick agency colors from the selected flag.  Either with a color picker on the GUI, like 5 prepopulated color buttons taken from the flag colors, or just as hex values in a agency custom config file with a custom flag.

Edited February 26, 2023 by histalonia

[histalonia]

Reason for picking colors from the flag, is I find I spend 2 or 3 minutes trying to get the exact color to match my Flag colors.  That just takes time with the current interface.