Avoid the ambiguous term "color map"

Instead, use

• "heat map" for plots of color-coded z vs Cartesian x,y;
• "color scheme" for a color coding (called "color gradient" in Matplotlib)
• "color legend" for a bar that shows color vs z

References:

• https://en.wikipedia.org/wiki/Heat_map
• https://www.nature.com/articles/nmeth.1902
• https://mathworld.wolfram.com/ContourPlot.html confounds true contour maps and heat maps, which is not helpful

Change terminology in:

• GUI
• Documentation
• Python API and example scripts (including comments)

added GUI Python cleanup docs labels

"Color scheme" (now "Gradient") and "Color legend" look very clear. Instead of "Heat map" I would propose "Intensity map". It does not allow for discrepancies.

"Heat map" is the way of plotting z vs x,y. In BornAgain, we usually have z=intensity, so that "intensity map" is also appropriate in many places. We should prefer the more generic term "heat map" for tools and functions that may be used for other z. For instance, to support interactive fitting we may plot z=(I_fit-I_dat)/I_dat.

Agree.

changed the description

marked the checklist item GUI as completed

mentioned in merge request !838 (merged)

mentioned in merge request !850 (merged)

marked the checklist item Python API and example scripts (including comments) as completed

marked the checklist item Documentation as completed

mentioned in merge request !851 (merged)

closed with merge request !851 (merged)

mentioned in commit 92ad8e57