v4.0.37.12 fileset

• Add default settings for variables (constants) that may not be defined.
• Reduce code necessary for logic.
• Move the install error notification (need to run install) up in front of the notification that the directory needs to be assigned based on user feedback during initial installation.
• Address notifications that occur with increased PHP versions and/or stricter notification.
• Prevent attempt providing a list of files if the directory folder hasn't been defined.
• Update ep4_cron to include the changes above.
• Provide support for utf8mb4 database collation.
• Add notification that an uploaded file was too large.
• Correct issues with category meta imports of data using the language code.