Allow for changing project tracking default to false

[Milan]

Hi there, because I just tapped into this requirement with somebodies deployment, I'd like to create this as a feature request because every related ticket/pull seems to be closed. The organization in question does not want to include tracking. While yes, it can be turned off per campaign, they are now afraid of potential user error.

• #151 was mentioning this but got closed prematurely
  • related merged pull #152 mentions that this needs defaults implemented in general

Perhaps Keila could look for a environment variable until this is implemented?