You have 50 user databases on your server. Model has been left at the default file growth of 1 MB for the data file and so all (or almost all) of these databases have a data file growth set at 1 MB for file growth. Use this to set them all to 10%, at least. Later you can go about tweaking them individually.
Note: this is to make sure you only get the online databases: AND DATABASEPROPERTYEX(''?'', ''Collation'') IS NOT NULL
Note also this only works on the first data file of each database. I am assuming if you have databases with multiple files on them, whoever created the second data file new what they were doing.