ISO Loader 0.8.x Beta + preview of DreamShell v4.0 RC 5

[SWAT]

New test build #19: https://github.com/DC-SWAT/DreamShell/releases

Core:
- Fixed rendering for mouse cursor.
- Fixed rendering for GUI FileManager widget.
- Improved scrolling and hotkeys for GUI FileManager widget (added X+D-Pad variant).
- Fixed and improved DS Settings also support SD/IDE to save it instead of VMU.

ISO Loader application:
- Show settings by "B" button on gamepad if game selected.
- Run selected game from anywhere with shared Launch button (just press Right on d-pad).
- Updated notes with gamepad controls.

ISO Loader firmware:
- IRQ fixes (some WinCE back to working).
- Improve VMU emulation (less is lost).