Papers3 improvements (#611)

- And Tab5 keyboard improvements
- Usb host keyboard improvements
- Symbols
- Requires the device.py change from CL-32 PR but that only affects visuals and not build breaking

TactilityKernel/source/symbols.c

@@ -171,6 +171,7 @@ const struct ModuleSymbol KERNEL_SYMBOLS[] = {
     DEFINE_MODULE_SYMBOL(file_system_unmount),
     DEFINE_MODULE_SYMBOL(file_system_is_mounted),
     DEFINE_MODULE_SYMBOL(file_system_get_path),
+    DEFINE_MODULE_SYMBOL(file_system_for_each),
     // memory
     DEFINE_MODULE_SYMBOL(MEMORY_POLICY_DEFAULT),
     DEFINE_MODULE_SYMBOL(memory_print_stats),