* Fix#92539: Hard to read the breadcrumbs.
* Fix View Item active, hover, and text color (e.g. count numbers in the
Spreadsheet were almost unreadable).
* Fix mismatching node type colors with the default theme.
Blender Light is meant to be simply a brighter version of the default,
so screenshots and tutorials can be followed with both themes.
* Use the same outline color for widgets, so they match when aligned in a row.
* Make panels standout (not fully transparent), like in the default theme.
c785e7431e