* Thread-safe.
* Provides getter/setter functions for the data types used by nxdumptool's configuration.
* Each setter function writes the modified JSON configuration back to the SD card.
* Configuration is validated on interface initialization. If validation fails, a default JSON template is loaded from the application's RomFS and written back to the SD card.
Other changes:
* Implement directory creation.
* Moved more preprocessor definitions to defines.h.
* Replaced strtok() calls throughout the code with strtok_r() to guarantee thread-safety.
* Refocus logic now also takes care of updating Borealis' internal focus stack if a view has been pushed on top of the root view using a ListItem from LayeredErrorFrame.
* Further modifications to Borealis are used to store a pointer to the corresponding sidebar item in LayeredErrorFrame objects.
* The UI code now always uses C++-style casts.
* Git commit information is now displayed next to the nxdumptool release version.
* The applet mode warning is now displayed centered at the top.
* Title IDs in title lists are now displayed at the right of each entry.
