Implemented palette ordering (issue 112). You can activate it in the secondary palette window (shift-P), it's saved in gfx2.ini.

The skin file has 2 more icons for the arrows (Ilija, grafx2 won't load if you don't update yours)
Updated contextual help for the secondary palette window.
Fixed some typos in code.

git-svn-id: svn://pulkomandy.tk/GrafX2/trunk@704 416bcca6-2ee7-4201-b75f-2eb2f807beb1

struct.h

@@ -238,6 +238,7 @@ typedef struct
   byte Couleurs_separees;
   word Palette_cells_X;
   word Palette_cells_Y;
+  byte Palette_vertical;
   byte FX_Feedback;
   byte Safety_colors;
   byte Opening_message;