Fix flashing travel companion card

[sharhio]

Proposed Changes

• Fixes an incorrect card flashing between "board the vehicle" and "travel on the vehicle" cards.
• legChange value is taken into account when determining whether to show previous or current leg info to ensure that there is no rendering glitch while the cardChanging variable with timer is being set.
• Both current and the nextLeg are reverted to the previous value when the animation is in motion to keep the view consistent.

Pull Request Check List

• A reasonable set of unit tests is included
• Console does not show new warnings/errors
• Changes are documented or they are self explanatory
• This pull request does not have any merge conflicts
• All existing tests pass in CI build

Review

• Read and verify the code changes
• Test the functionality by running the UI locally with all popular browsers available in your platform
• Check that the implementation matches the design, when such one is defined in an issue in Azure Boards
• Merge the pull request