Improve design of detail view for one register object

• Make that the buttons don't overlap on small sizes (suggestion: full-width, one row for each button on size s)
• Restructure heading: Make font size smaller, use two lines (first: date + period, second: group, subject, teacher)
• Show explanation for status icon and put into a better fitting position
• Fix tab bar
• Use short names for all items in the heading (subject, group, teacher)
• Remove "back to" from "Back to week overview"
• Use short name for subjects in buttons

added part::frontend prio::2 type::bug workflow::discussing labels

assigned to @hansegucker

changed the description

created merge request !235 (merged) to address this issue

mentioned in merge request !235 (merged)

marked the checklist item Make that the buttons don't overlap on small sizes (suggestion: full-width, one row for each button on size s) as completed

marked the checklist item Restructure heading: Make font size smaller, use two lines (first: date + period, second: group, subject, teacher) as completed

marked the checklist item Show explanation for status icon and put into a better fitting position as completed

marked the checklist item Fix tab bar as completed

marked the checklist item Use short names for all items in the heading (subject, group, teacher) as completed

marked the checklist item Remove "back to" from "Back to week overview" as completed

marked the checklist item Use short name for subjects in buttons as completed

mentioned in merge request AlekSIS-App-Chronos!197 (merged)

mentioned in merge request AlekSIS-App-Chronos!201 (merged)

added source::customer label

mentioned in merge request AlekSIS-Core!789 (merged)

closed with merge request !235 (merged)

mentioned in commit 73aef4f1