Warning Improvements by Xon 2.11.4

Fix javascript error when issuing a warning from a user's profile

Fix admincp template modifications for XF2.3

Fix possible error when using warning conversations/direct messages

• Restore XF2.1 support
• php 8.4+ compatibility fixes
• Fix deleting a warning could skip show a delete confirmation dialog

• Fix edge case where legacy warning definitions with >255 characters would cause an internal server error instead of reporting the warning definition's title was too long

If installed, require Alert Improvements v2.9.0+
Compatibility fix with Alert Improvements when warning anonymization is enabled and warning alerts are sent

Only show "Hide x old warnings" phrase if there are old warnings on a user's profile to hide

Add new "Profile warning tab - Old-age limit" option
This option is initialized to have the same value as the "Escalating default warning expiry - Old-age limit" option
There is a checkbox to show these warnings if required

• Require php 7.2+
• Require Standard Library by Xon v1.18.0+
• Fix a warning title of > 255 characters could be entered and it would be silently truncated. Field is now correctly length checked

• Fix editing a warning to disable the spoilered content warning did not remove the spoiler title
• Fix deleting a warning did not disable injecting a spoiler tag into post contents