1431398 - "Mailto Is Default" flag is incorrect after the mailing app is changed to default by deleting a third party mailing app

Status: NEW

(Firefox for iOS :: General, defect, P3)

Description

[Simon Basca [:SimonB]]

Build: 10.5 (8341)
Device: iPhone 6S
iOS: 11.1

Pre-requsites:
- Install only one third party mailing app on the device for e.g. "Outlook"

Steps to reproduce:
1. Launch Firefox
2. Open Settings -> Mailing app
3. Select "Outlook" as the default mailing app from the mailing list
4. Close and Restart Firefox
5. Check the Leanplum User Attributes ("Mailto Is Default: False")
6. Delete "Outlook" 
7. Close and restart Firefox
8. Check the Leanplum User Attributes 

Actual results:
- After restarting Firefox and refreshing Leanplum the User Attributes "Mailto Is Default" flag will be "False".

Expected results:
- After deleting the selected third party mailing app (in this case Outlook) and the mailing app will be automatically changed to the default one, the "Mailto Is Default" flag should be "True".

Note: 
- The flag will be correct only after deleting the third party mailing app and entering "Mailing App" from "Settings" menu.