DISCUSS: When prompting for CiviCRM upgrade, provide info about compatibility of installed extensions
Created by: twomice
CiviCRM notifies when a new core version is available. This improvement adds information to that notice, e.g, for each installed extension:
"CiviCRM 5.5 is available. CiviFoobar extension is already being used by 1000 users on CiviCRM 5.5; only 2 have reported problems."