New Firmware: Apex M800 -- 1.21

- Enables SSE3 to flash the key that was pressed to toggle live macro recording, showing you that a macro is currently being recorded.

Bug Fixes:

- Closed a loophole where you could open multiple macro editor windows at the same time.
- Fixed a specific case where device configuration windows would error when being loaded.
- Keyboards on OSX now will not require reconnecting after reboot.
- Maximizing the main window will now save the maximized state, and be recalled as maximized.
- If the main SSE3 background process is not found when you load the UI, it will now display the correct platform-appropriate name of the process.
- Fixed some playback option fields appearing to be disabled when they could indeed be used.
- The Glock Fade lighting template for the Apex M800 now has a reactive effect for each key, going from its resting color up to white on keypress.