HexPad needs Masked Edit Mode

[GoogleCodeExporter]

The Hex Pad currently does not support editing of masked or partial values.  
The only values supported right now are SceUInt32 values.  Support needs to be 
added for SceUInt16 and SceUInt8 as well as the ability for the user to specify 
masks while editing.  This really only affects the Cheat Editor.

Original issue reported on code.google.com by sirgeef...@gmail.com on 8 Jun 2011 at 11:24