Add-ons Warning Improvements by Xon 2.9.4

• When issuing a warning, ensure the default warning titles are rendered in the warned user's language

• If installed, require Report Improvements v2.8.0
• Fix black page when issuing warnings when the issuer doesn't have permission to view the warning they just created
• Fix warning conversation emails had the wrong sender attributed to them
• Force global namespace for functions which are known to be optimizable to bytecode in php
• Use receiving user language when generating replacables for warnings & user acknowledgement notes
• New permission "Delete issued warnings", if a user lacks this permission and "Delete all warnings", prevent editing/deleting warnings they have issued

• Fix php-version dependent typo "syntax error, unexpected token "\"