fix(slides): set height to 100% for vertical slides

[brandyscarney]

Pull request checklist

Please check if your PR fulfills the following requirements:

• Tests for the changes have been added (for bug fixes / features)
• Docs have been reviewed and added / updated if needed (for bug fixes / features)
• Build (npm run build) was run locally and any changes were pushed
• Lint (npm run lint) has passed locally and any fixes were made for failures

Pull request type

Please check the type of change your PR introduces:

• Bugfix
• Feature
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no api changes)
• Build related changes
• Documentation content changes
• Other (please describe):

What is the current behavior?

Slides doesn't take up a set height so it will show some of the inactive slides when direction is set to vertical

Issue Number: fixes #17341

Dev build: 5.1.0-dev.202002241801.ce23bbc

What is the new behavior?

This sets the slides height to 100% which will ensure that only the active slide is visible until swiping.

Does this introduce a breaking change?

• Yes
• No

Other information