[RAPPS] Replace Extract with FDI for handling .cab

FDI allows to have user-defined callbacks for file handling.
Since it doesn't provide support for Unicode we convert strings to
multi-byte UTF-8 and handle them appropriately in the callbacks. They
are properly null-terminated so FDI won't choke when doing operations
with strings.

Thanks to hbelusca and mjansen for the help.

CORE-14466

base/applications/rapps/CMakeLists.txt

@@ -9,6 +9,7 @@ include_directories(include)
 list(APPEND SOURCE
     aboutdlg.cpp
     available.cpp
+    cabinet.cpp
     gui.cpp
     installed.cpp
     integrity.cpp
@@ -22,7 +23,6 @@ list(APPEND SOURCE
     include/gui.h
     include/dialogs.h
     include/installed.h
-    include/cabinet.h
     include/crichedit.h
     include/defines.h
     include/misc.h