refactor: migrate card component

Created by: Tirokk

Authored by alina-beck Jan 22, 2020 Merged Feb 21, 2020

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🍰 Pullrequest

• replaces the ds-card component from the styleguide with a new base-card component
• adds a CardWithColumns component (for two-column layouts like LoginForm)
• refactors and renames Comment component --> CommentCard
• refactors TeaserImage
• refactors ContributionForm
• refactors CategoriesSelect
• refactors Notification
• refactors and improves design of DeleteData
• refactors, adjusts design and renames PostCard --> PostTeaser
• refactors and improves design of LoginForm

ToDo

• replace magic numbers with variables 😉
• wait for PR #2585 to be merged into master
• merge master into this branch
• rename TeaserImage to ImageUploader

maybe in separate PRs:

• remove unimplemented pages (and make sure we have issues for all the features)
• refactor post page and profile page

Design Changes

delete data before:

delete data after:

post card before:

post card after:

login form before:

login form after:

Issues

• fixes #2685 (closed)