Check For Upgrade Before Running on_start event
Check For Upgrade Before Running on_start event

Check For Upgrade Before Running on_start event

Some packages attache events that can have issues when they expect to be
in full page render context and upgrades.

- Do not fire on_start on upgrade

MichaelMaar/concrete5,TimDix/concrete5,matt9mg/concrete5,avdevs/concrete5,matt9mg/concrete5,TimDix/concrete5,avdevs/concrete5,avdevs/concrete5,MichaelMaar/concrete5,MichaelMaar/concrete5,matt9mg/concrete5,TimDix/concrete5