[feature proposal] make picked colours easily identifiable

[Ralph]

This is a feature proposal.

Pinta is a light and handy tools for basic image manipulation. When inserting a new imagine into Pinta it is often helpful to be able to detect the colour code.

Ideally when selecting a primary or secondary colour but as well when picking a colour with the colour picker tool, it would be good to have not only the location (x&y displayed at the bottom of the application) but as well the exact colour code displayed right next to it.

It would be ideal if - when clicking on the colour the colour code could be changed to the one that makes sense to the use (RGB Hex etc).

[Cameron White (cameronwhite91)]

One note: it is possible to get the color code by clicking on it in the color palette. The GTK3 color chooser dialog made this a bit harder to find, so it requires an extra click to go into the "custom" color chooser mode which has the hex code