desktop-ui: Fix broken firmware path setting. (#1374)

* Fix the firmware search path not being saved or loaded from the
settings file.
* Fix `FirmwareSettings::findFirmware` not using the right casing when
locating the firmware directory.

desktop-ui/settings/firmware.cpp

@@ -112,7 +112,7 @@ auto FirmwareSettings::eventScan() -> void {
 }
 
 auto FirmwareSettings::findFirmware(string hash) -> string {
-  auto firmwarePath = settings.paths.firmware ? settings.paths.firmware : locate("firmware/");
+  auto firmwarePath = settings.paths.firmware ? settings.paths.firmware : locate("Firmware/");
   if(!directory::exists(firmwarePath)) return {};
 
   for(auto& filename : directory::files(firmwarePath)) {
@@ -131,4 +131,4 @@ auto FirmwareSettings::findFirmware(string hash) -> string {
   }
 
   return {};
-}
+}

desktop-ui/settings/settings.cpp

@@ -105,6 +105,7 @@ auto Settings::process(bool load) -> void {
   bind(natural, "Rewind/Frequency", rewind.frequency);
 
   bind(string,  "Paths/Home", paths.home);
+  bind(string,  "Paths/Firmware", paths.firmware);
   bind(string,  "Paths/Saves", paths.saves);
   bind(string,  "Paths/Screenshots", paths.screenshots);
   bind(string,  "Paths/Debugging", paths.debugging);