Foreground color cannot be configured for "Search Result" and "Occurrences"

Foreground color cannot be configured for "Search Result" and "Occurrences"
which makes text barely readable when using a bright background color for
better spotting occurrences (e.g. yellow).

Since other text elements in a scheme can have a custom foreground color
(e.g. "Unused Occurrence") there is no reason that foreground color is
missing for "Search Result" and "Occurrences".