Implement alternating row colors

Once again, surprisingly difficult, as you can see on the number of
changed files.

Coding the configuration options wasn't that difficult, but actually
using them was. As it turned out, the default style on Windows doesn't
use QApplication::palette() at all, though it does honor
setAlternatingRowColors(). It just doesn't use the palette colors, but
style sheets. Took me a while to figure out.

So, there's always another layer of indirection: First, add all
QTreeViews to Globals::views, then create a helper to set the style
sheet.

1 files changed, 1 insertions, 0 deletions

diff --git a/helper.h b/helper.h
index c8982b4..4883a5f 100644
--- a/helper.h
+++ b/helper.h
@@ -13,6 +13,7 @@ namespace Helper {
     const QImage snapshot(const QString &file, int offset);
     const QString appDataDir();
     const QIcon icon(const QColor &bg, const QChar c, bool bold = true);
+    void setAlternatingRowColors();
     class Duration {
         public:
             Duration();