Add ptr_drop to the sprite pool

This is a left handed pointer to signify a drag and drop operation in progress.
The sprite makes use of the mask to define the hotspot to be the tip of the arrow, for Wimp/SpriteExtends that understand that.

Propagated the hotspot definition on ptr_write to the other sprite sets, previously it was only in the Iyonix theme.
Missing ptr_menu and friends added to Morris theme.
Made file_ffb more distinct from the other system files in Ursula theme.

Version 5.47. Tagged as 'Wimp-5_47'

VersionASM

@@ -11,13 +11,13 @@
                         GBLS    Module_HelpVersion
                         GBLS    Module_ComponentName
                         GBLS    Module_ComponentPath
-Module_MajorVersion     SETS    "5.46"
-Module_Version          SETA    546
+Module_MajorVersion     SETS    "5.47"
+Module_Version          SETA    547
 Module_MinorVersion     SETS    ""
-Module_Date             SETS    "24 Sep 2014"
-Module_ApplicationDate  SETS    "24-Sep-14"
+Module_Date             SETS    "15 Nov 2014"
+Module_ApplicationDate  SETS    "15-Nov-14"
 Module_ComponentName    SETS    "Wimp"
 Module_ComponentPath    SETS    "castle/RiscOS/Sources/Desktop/Wimp"
-Module_FullVersion      SETS    "5.46"
-Module_HelpVersion      SETS    "5.46 (24 Sep 2014)"
+Module_FullVersion      SETS    "5.47"
+Module_HelpVersion      SETS    "5.47 (15 Nov 2014)"
                         END

VersionNum

-/* (5.46)
+/* (5.47)
  *
  * This file is automatically maintained by srccommit, do not edit manually.
  * Last processed by srccommit version: 1.1.
  *
  */
-#define Module_MajorVersion_CMHG        5.46
+#define Module_MajorVersion_CMHG        5.47
 #define Module_MinorVersion_CMHG        
-#define Module_Date_CMHG                24 Sep 2014
+#define Module_Date_CMHG                15 Nov 2014
 
-#define Module_MajorVersion             "5.46"
-#define Module_Version                  546
+#define Module_MajorVersion             "5.47"
+#define Module_Version                  547
 #define Module_MinorVersion             ""
-#define Module_Date                     "24 Sep 2014"
+#define Module_Date                     "15 Nov 2014"
 
-#define Module_ApplicationDate          "24-Sep-14"
+#define Module_ApplicationDate          "15-Nov-14"
 
 #define Module_ComponentName            "Wimp"
 #define Module_ComponentPath            "castle/RiscOS/Sources/Desktop/Wimp"
 
-#define Module_FullVersion              "5.46"
-#define Module_HelpVersion              "5.46 (24 Sep 2014)"
-#define Module_LibraryVersionInfo       "5:46"
+#define Module_FullVersion              "5.47"
+#define Module_HelpVersion              "5.47 (15 Nov 2014)"
+#define Module_LibraryVersionInfo       "5:47"