add mly conditional to per-pipeline, event upload, and preferred event tables

some pipelines like Mly have different event subclasses (in this case, mlyburstevent), which the snr attribute belongs to. the tables listed in the title didn't check if an event was an mlyburstevent when displaying snr, but this MR fixes that.

mentioned in merge request !214 (merged)

added 2 commits

• 9fe6e865 - 1 commit from branch master
• 50419e32 - add mly conditional to per-pipeline, event uplaod, and preferred event tables

Compare with previous version

merged