Fix slider / scrollable message time out message

[joeljfischer]

Fixes #1526

This PR is ready for review.

Risk

This PR makes no API changes.

Testing Plan

• I have verified that I have not introduced new warnings in this PR (or explain why below)
• I have run the unit tests with this PR
• I have tested this PR against Core and verified behavior (if applicable, if not applicable, explain why below).

Unit Tests

All changes are example app only, so no unit tests are needed.

Core Tests

• Time out scrollable message and slider on both Obj-C and Swift example apps

Core version / branch / commit hash / module tested against: Sync 3.0 19205_DEVTEST
HMI name / version / branch / commit hash / module tested against: Sync 3.0 19205_DEVTEST

Summary

This PR changes the error handling the Obj-C and Swift example app menu options to display a Slider and ScrollableMessage. If they timeout, they now display an appropriate alert instead of a confusing one.

Changelog

Bug Fixes

• Improved the example apps' slider and scrollable message timeout alerts.

CLA

• I have signed the CLA