[FE] Preferences & Calibration (#332)

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## Jira Ticket
[SP-1707](https://syncrow.atlassian.net/browse/SP-1707)

## Description

change the color of completed dialog

## Type of Change

<!--- Put an `x` in all the boxes that apply: -->

- [ ] ✨ New feature (non-breaking change which adds functionality)
- [x] 🛠️ Bug fix (non-breaking change which fixes an issue)
- [ ] ❌ Breaking change (fix or feature that would cause existing
functionality to change)
- [ ] 🧹 Code refactor
- [ ] ✅ Build configuration change
- [ ] 📝 Documentation
- [ ] 🗑️ Chore 


[SP-1707]:
https://syncrow.atlassian.net/browse/SP-1707?atlOrigin=eyJpIjoiNWRkNTljNzYxNjVmNDY3MDlhMDU5Y2ZhYzA5YTRkZjUiLCJwIjoiZ2l0aHViLWNvbS1KU1cifQ

lib/pages/device_managment/curtain_module/widgets/calibrate_completed_dialog.dart

@@ -17,6 +17,7 @@ class CalibrateCompletedDialog extends StatelessWidget {
   @override
   Widget build(_) {
     return AlertDialog(
+      backgroundColor: ColorsManager.whiteColors,
       contentPadding: EdgeInsets.zero,
       content: SizedBox(
         height: 250,