Improvements of barchart

[broeder-j]

What should still be improved about the bar chart

High Prio

• Add All and Sum always. Where 'All' is the total of all answers.
• Add 'relative/absolut' button
• Add general/other data Filters (i.e CareerLevel and Data generation method)
• Consistent Colors between widgets and plot
• Nice labels
• Nice titles and scaling
• Resizing
• Fix hover tool

Nice to have:

• Allow to customize change the display order of categories
• Horizontal/vertical bar plot button and functionality
• All to export also the current Data shown in the plot (wont be supported, since we will display a richer data set than published)
• Shade data on hover
• Display use hints for all widgets on hover (not sure if a supported feature of panel)