Fixed Shell Title Bar Not Reappearing on iOS After Using SearchHandler in .NET MAUI

[Dhivya-SF4094]

Note

Are you waiting for the changes in this PR to be merged?
It would be very helpful if you could test the resulting artifacts from this PR and let us know in a comment if this change resolves your issue. Thank you!

Issue Details:

When using Shell.SearchHandler on iOS, the title bar disappears when a search is initiated but doesn't reappear after the search is completed by tapping the search button on the keyboard.

Root Cause

When a search is completed by tapping the "Search" button on the keyboard, the SearchButtonClicked event handler was correctly calling QueryConfirmed() but wasn't explicitly setting _searchController.Active = false. This left the search controller in an active state.
Even though the search action completed functionally (the search query was processed), visually the UI remained in "search mode" with the title bar hidden because the search controller was still considered active by iOS.

Description of Change

Added code to set _searchController.Active = false in the SearchButtonClicked method before invoking QueryConfirmed():
This change ensures that the UISearchController is properly deactivated when the search is completed via keyboard, which restores the title bar to its normal state.

Validated the behaviour in the following platforms

• Android
• Windows
• iOS
• Mac

Issues Fixed:

Fixes #14448

Screenshots

Before	After
14448_BeforeFix_iOS.mov	14448_AfterFix_iOS.mov

[dotnet-policy-service]

Hey there @@Dhivya-SF4094! Thank you so much for your PR! Someone from the team will get assigned to your PR shortly and we'll get it reviewed.

[jsuarezruiz]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 3 pipeline(s).

[jsuarezruiz]

/azp run MAUI-UITests-public

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).