Resolve "Allow teachers opening lessons on the same day before they start"

Closes #95 (closed)

changed milestone to %1.0a1

added part::backend prio::1 source::customer type::feature labels

added 1 commit

• 6440c8a2 - Allow teachers to open lesson periods in the future if they are on the same day

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added 3 commits

• 6440c8a2...34107e65 - 2 commits from branch master
• 4efc5015 - Merge branch 'master' into 95-allow-teachers-opening-lessons-on-the-same-day-before-they-start

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unmarked as a Work In Progress

assigned to @nik

mentioned in commit 19ac25fc

merged