Rollback angle changes to fix some regressions - While the recent updates to angle (compatibility mode) support helped many users which were encountering a startup crash, they also introduced new issues, such as partially black screens (especially after alt-tabbing).
For the time being we are reverting this change.
Fix compatibility mode not working on some systems
Upgrade ANGLE to fix libGLESv1_CM errors - This also fixes issues restoring the osu! window after minimising (when using compatibility mode).
Fix incorrect Nvidia Optimus detection on desktop platforms
Editor
Disallow saving a new beatmap difficulty if any of the metadata fields are empty - This was done to avoid data loss caused by setting fields to empty, reported by several users.
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Adjust minimum stack lenience in song setup UI in line with ranking criteria
Fix excessive circle size values being reverted on opening song setup dialog
Reliability
Add fallback startup mode on optimus-based hardware startup crashes - A driver update was pushed out over the last week by NVIDIA which has caused startup crashes for some users, with osu! showing an error message reading "Can't find the Intel graphcs".
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