In the Wiki you will find solutions that include updating OOB Macros or UI Pages, however this will obviously cause those files to be skipped during the next upgrade. So how do you go about updating UI Pages and Macros (or other records) without future upgrades being impacted?
The answer is actually quite simple. I discover this little nugget in the Wiki:
By default, the Active field on a tracked table is treated as update_exempt even if the attribute is not present (starting with the Calgary release)
This means that if we clone the original record, set the original record to “active=false”, then we can continue to make changes to the copy record without affecting the upgrade process. The only thing to note is after an upgrade you will want to check the difference between the files so in the event there was a change, you can manually upgrade your updated record.