Delaying/undelaying round end is no longer a toggle under the same href.
Delaying and undelaying the round end are now explicit operations. If two admins attempt to delay round end at the same time, the first admin to input a reason wins and the second admin instead gets an alert that the round end is already delayed along with the reason instead of accidentally untoggling it.
FINALLY, undelaying round end will no longer trigger an immediate auto server reboot when SSticker.ready_for_reboot is TRUE. The admins are messaged that they must Reboot World manually. This is the final guard against admins accidentally undelaying when they're not actually ready to do so.
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