[plasmalnf] Change to IgnoreAspectRatio

It is the distro's responsibility to produce screenshots that look
good; previously I chose to preserve the aspect ratio on the grounds
that this would keep the look of the screenshot even if the distro
had done one in a weird size. This makes the screenshot part
of the LNF selection look weird, though, since then you get
blank parts.

Switch to ignoring the aspect ration; distro's should produce
screenshots in a 12x8 (i.e. 3:2) aspect ratio, preferrably at
least 120x80 pixels -- but keep in mind hiDPI and the default
font sizes of the distro, which may make other sizes look better.

(this follows discussion with BlueStar Linux)

src/modules/plasmalnf/ThemeWidget.cpp

@@ -58,7 +58,7 @@ ThemeWidget::ThemeWidget(const ThemeInfo& info, QWidget* parent)
         image.fill( QColor( QRgb( hash_color ) ) );
     }
 
-    image = image.scaled( image_size, Qt::KeepAspectRatio, Qt::SmoothTransformation );
+    image = image.scaled( image_size, Qt::IgnoreAspectRatio, Qt::SmoothTransformation );
 
     QLabel* image_label = new QLabel( this );
     image_label->setPixmap( image );