Fix default value

Author: dlorch

config.go

@@ -108,7 +108,7 @@ var defaultConfig = &Config{
 	AutoUpdateEnabled:    true, // Set a default value
 	ActiveExtension:      "",
 	KeyboardMacros:       []KeyboardMacro{},
-	KeyboardLayout:       "en-US",
+	KeyboardLayout:       "en_US",
 	DisplayMaxBrightness: 64,
 	DisplayDimAfterSec:   120,  // 2 minutes
 	DisplayOffAfterSec:   1800, // 30 minutes

ui/src/hooks/stores.ts

@@ -400,7 +400,7 @@ export const useDeviceSettingsStore = create<DeviceSettingsState>(set => ({
     });
   },
 
-  keyboardLayout: "en-US",
+  keyboardLayout: "en_US",
   setKeyboardLayout: layout => set({ keyboardLayout: layout }),
 }));