Use fontawesome icon for the HTML details element

As discussed in the Mattermost channel, I replaced the default triangle with Fontawesome icons.

added 3 commits

• 91052eb1 - center cards on front page
• 53ab9d7f - Merge branch 'center-events-news-cards' into 'master'
• c71fd21e - Use fontawesome icon for the HTML details element

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changed target branch from overall-motivation-extendable to master

added 1 commit

• 54669591 - Use fontawesome icon for the HTML details element

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approved this merge request

@frust45 thanks, fine!

Not sure in which order you plan to merge, but please do :)

enabled an automatic merge when the pipeline for 54669591 succeeds

merged

mentioned in commit 1dccc64c

mentioned in merge request !245 (merged)