Notice boards should use the $js7EpochMilli variable to calculate expecting and posting Order IDs

Current Situation

• JOC Cockpit makes use of the \$epochMilli variable when adding a Notice Board. This variable is used for both rules to calculate the expected Notice ID and the posting Notice ID.
• The name of the variable used is wrong. It should be $js7EpochMilli instead of $epochMilli.

Desired Behavior

• JOC Cockpit should use $js7EpochMilli instead of $epochMilli.

Workaround

• Users can use the "Edit JSON" operation from the Configuration view to directly modify the JSON document created by JOC Cockpit and replace any occurrences of $jepochMilli by $js7EpochMilli. When submitting this modification the immediately use the "Deploy" operation.
• This workaround will not work if in between the Notice Board configuration is modified from the GUI.