Add search of lines functionality in-app

Summary:
Fix bug of mismatching adapters

Filter in lowercase

Resolves T1199

Test Plan:
Open the tab Lines, tap a line.

Open the tab Lines, search "47", tap that line.

Open and close the tab Lines quickly, no crashes.

Open the tab Lines, tap the search bar, undo, tap, undo, no crash.

Reviewers: valerio.bozzolan

Reviewed By: valerio.bozzolan

Subscribers: valerio.bozzolan, Libre BusTO

Tags: Libre BusTO

Maniphest Tasks: T1199

Differential Revision: https://gitpull.it/D173