This PR would presumably
Fix#20522Fix#18773Fix#19069Fix#21077Fix#13622
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1. Check whether unit type is currently enabled
2. Check if it _will_ be enabled via opt
3. Allow modification as necessary
Signed-off-by: jolheiser <john.olheiser@gmail.com>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
Co-authored-by: 6543 <6543@obermui.de>