Histogram Bars - add Sort, Highlight to Filter

[alexsb]

Right now, clicking a histogram bar in the header of a categorical column filters out that category. While this is generally useful behavior, I wonder whether this should be the only behavior we support.

In particular, I'd expect a common use-case to be that I want to hover over a category and then "see all elements" of that category. I can't really do that easily at the moment. I could sort and scroll, or I could filter out all other elements.

Similarly, we want to be able to highlight elements of a certain category, as described in #488.

I'm suggesting that we provide a menu when you click the bar, that offers three options:

• Bring elements in C to the top; Label: "Show all C items"
• Filter elements in C; Label: "Filter C items"
• Highlight elements in C; Label: "Highlight C items"

[alexsb]

Think about context menus and defaults.

[sgratzl]

Bring elements in C to the top; Label: "Show all C items"
how does that influence the rank sorting? what if there are grouping criteria applied (e.g. by a different category)? what if it is the grouping criteria?

[alexsb]

Re Sorting: sorting by category (possibly implemented as by selection) would be the top-ranked sorting criterion.

Re Grouping: trickier, but I think grouping would remain, but within groups, it would be sorted by category