Fix document picker tint colors, remove multi-selection feature flag

[stefanceriu]

No description provided.

[github-actions]

	Warnings
⚠️	Please provide a description for this PR.
⚠️	You seem to have made changes to views. Please consider adding screenshots.

Generated by 🚫 Danger Swift against d298690

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[codecov]

❌ 1 Tests Failed:

Tests completed	Failed	Passed	Skipped
1057	1	1056	0

View the top 1 failed test(s) by shortest run time

NotificationManagerTests::test_whenStartAndAuthorizedAndNotificationDisabled_registerForRemoteNotificationsNotCalled()

Stack Traces | 2.24s run time

XCTAssertFalse failed (.../Sources/NotificationManager/NotificationManagerTests.swift:165)

View the full list of 1 ❄️ flaky tests

HomeScreenViewModelTests::testDeclineInvite()

Flake rate in main: 19.05% (Passed 204 times, Failed 48 times)

Stack Traces | 0.093s run time

XCTAssertEqual failed: ("["someAwesomeRoomId2", "someAwesomeRoomId1"]") is not equal to ("["someAwesomeRoomId2"]") (UnitTests/Sources/HomeScreenViewModelTests.swift:327)

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