Highlight search results background color makes text barely readable

[nico-onmap]

When doing a search in files, matches are highlighted using a yellowish background color that makes the text very difficult to read:

This happens on Windows 10, VSCode 1.13.0-insider (commit 5057c95e), dracula 1.16.0

[nico-onmap]

For comparison, here is the background color used for normal (mouse) text selection:

[dsifford]

Thanks for the report. This is a dupe of #33. Closing this one in favor of that one.