MailWizz - Email Marketing Application 2.6.1

[ENH] - Added ability to enable/disable click and open tracking provided by Sparkpost, per delivery server
[MSC] - Overall fixes
[UPD] - Updated composer packages

[ADD] - Added OpenAPI specs for the API (`/api/index.php/docs`)
[ADD] - Added listfieldvalue_model_value_max_length and surveyfieldvalue_model_value_max_length filter hook
[ADD] - Added honeypot for the public "Block Address" page
[RMV] - Removed DynEmail
[MSC] - Overall fixes
[UPD] - Updated composer packages

[BUG] - CTimestampBehavior would default to a timestamp if the datetime column definition would contain comments
[BUG] - Fixed CKeditor warning display related to version upgrade. We'll take the time to upgrade to the major version
[MSC] - Overall fixes
[UPD] - Updated composer packages