rw.ui.beginWarn autoSelectReasonIndex does not work correctly on single warnings
Example:
rw.ui.beginWarn(false, "Sandbox for user warnings", "test", null, null, false, 90);
Occurs when using auto warn from quick rollback which selects a single warning. RW does not detect is a single warning by click() event, and therefore appends a level to the end as if it is a multi-level warning.
To fix for RedWarn 15.