v1.5.1 - the results are readable on a dark desktop

What changed

If your system uses a dark theme, some rows in the results table were hard to
read - our light row colour with the system's white text on top of it - and you
had to click a cell to see what it said. Section headers had the same mistake in
reverse: a colour for the text, none for the background.

Fixed the same way throughout: wherever the program sets one colour, it now sets
both. The small grey labels no longer use a fixed grey either - they take their
colour from your system's palette, so they stay readable whichever theme you use.

This was never a macOS-only problem. The same thing happens on Windows with
the dark app theme; we had simply never looked, because the machine this is built
on runs dark system chrome with light apps. It was reported by a photographer
running the Mac build, and found on Windows the same evening.

The English README now also explains why the report is a spreadsheet: it is your
file, not our database. Switch on the filters, sort by any column, add your own
columns - "keep", "check later", a note to yourself - and filter by those too.
The program remembers nothing about your decisions; the spreadsheet is where they
live, and it will still open in ten years.

Nothing else changed - same scanning, same reports, same files, same results.

Downloads

• Windows: SmartDuplicateFinder.exe - portable, no installation.
• macOS: SmartDuplicateFinder-macOS.zip - unzip and see the README for the
  steps macOS asks for on first run.

Thanks to the reader who took the time to run this on a Mac and write down what
was wrong. That is how this one got found.