Add option to highlight entire selected row of a List item

[ardnew]

This implements the option requested in #219

[rivo]

Generally ok with this. But could you please rename the member variable (and the function accordingly) to highlightTextOnly? I find spanSelectedBackgroundColor confusing.

GitHub says there are merge conflicts. You might want to pull in the latest changes before resubmitting.

[rivo]

You know, I've been thinking about this some more and I think this should not be the default. It will look quite odd on very wide screens with little text on a line.

So I think this should be called highlightFullLine instead and one can then use SetHighlightFullLine(true) to activate it.

[rivo]

Do you still want to make the proposed change? (It seems that you'll need to resolve a merge conflict, too, as the file has changed in the meantime.)

[ardnew]

finally resolved conflict and updated the field name as requested, please pull when ready

[ardnew]

You know, I've been thinking about this some more and I think this should not be the default. It will look quite odd on very wide screens with little text on a line.

Yeah, I suppose in that case it might look odd. Is that really the most common case though?

To me it seems like the current implementation diverges from widespread convention. I can't think of any list in any application where only the text is highlighted (all context menus, dropdown menus, list boxes, combo boxes in macOS, Windows, Gnome, and KDE; all list controls in Chrome and Firefox).

I realize these are graphical applications, but why would the convention be any different?

EDIT:
The Linux kernel's ncurses config tool make menuconfig is an example where only text is highlighted, but this is more of a tree view than a list.

[rivo]

I don't know. I just tried it on demos/list/main.go and it looks odd to me. And I don't even have a huge screen (working on a 13 inch laptop).

But if there are actual complaints from more users, I'm willing to rethink this.