Rather than destroy and reinitialize the dialog whenever it's closed,
and opened this dialog can just be hidden from view when it's not
needed, and shown again when it is needed.
Also, a dialog should really not be managing any live instances of
itself, including the one directly in the main frame.
This gets rid of another usage of the main frame global.
Changed the Cheat Search tab to disable the scan buttons while there is
not a game running and enable when it starts. Also added double-click to
create code to the result list.
Cleanup code style.
Move ActionReplay code->INI saving into ActionReplay namespace.
Threadsafety Cleanup: ActionReplay is accessed from the Host, Emu
and CPU Threads so the internal storage needs to be protected by a
lock to prevent vectors/strings being deleted/moved while in use by
the CPU Thread.
UI Consistency: Make ARCodes behave like Gecko Codes - only apply
changes when Apply is pressed. Save changes to INI from CheatsWindow.
ISOProperties/CheatsWindow now synchronize with each other.
ISOProperties loads codes using ActionReplay::LoadCodes which actually applies
the codes to the global state. If a game is running then that games receives
all the codes (and ACTIVE status) from the second game being shown in
ISOProperties which is not desirable.
