Better scaling options for widgets and quantities

A log scaling option should be added for scatter plots, periodic table and histograms.

• Modify Pydantic models to include log option
• Replace the use of pow scaling with log in FilterRegistry and in the apps. Log scaling gives the same effect and feels more natural in the scientific context. The aim is to possibly deprecate the pow scaling option completely.
• Add support for log ticks on PlotAxis, add tests.
• Add support of log scaling in getScaler, add tests.
• Add scaling option to WidgetHistogramEdit+WidgetHistogram
• Add scaling option to WidgetScatterPlotEdit+WidgetScatterPlot