Scale bar and Color bar

[toobiwankenobi]

When downloading an image, there should be an option to include the scale bar (and the size shown, e.g. 50µm, 100µm etc.). Also, the channel labels and the according color are important when downloading an image, otherwise, the user/viewer doesn't know what the meaning of the color is.

A color bar (with the intensity range) would also be important. When we create a validation slide for AirLab, we need to indicate the intensity range of the antibody signal (to show if the antibody gives a weak or a strong signal).

Scale bar option from HistoCAT++

Color bar with range shown in HistoCAT++