Decrease scale of preview because steam does not allow large previews

In the docs it state 1mb, in the manual upload it states 2mb!?!

ScreenPlay/src/createimportvideo.cpp

@@ -380,7 +380,7 @@ bool CreateImportVideo::createWallpaperVideoPreview()
         // We allways want to have a 5 second clip via 24fps -> 120 frames
         // Divided by the number of frames we can skip (timeInSeconds * Framrate)
         // scale & crop parameter: https://unix.stackexchange.com/a/284731
-        args.append("select='not(mod(n," + QString::number((m_length / 5)) + "))',setpts=N/FRAME_RATE/TB,crop=in_h*16/9:in_h,scale=-2:400");
+        args.append("select='not(mod(n," + QString::number((m_length / 5)) + "))',setpts=N/FRAME_RATE/TB,crop=in_h*16/9:in_h,scale=-2:120");
     }
     // Disable audio
     args.append("-an");