Fix payment instrument bug by using correct payment instrument

Fix issue with building smart groups when  is empty

#1823 Fix building the Price Field visibility options

Per https://github.com/civicrm/civicrm-core/pull/17589 it is necessary that we do NOT pass the wrong payment_instrument_id
to the payment processor. BUT we have to provide accurate defaults for manual payments. This is a narrower fix than

- back office membership form
- back office participant form
- back office contribution form

and in all cases the Manual processor still loaded correctly. I don't feel I can say this is the last fix in this
area but it stands alone as a sensible fix to do and also one that should address the immediate issue.

Note there is some weirdness in a second function in EventFees - that function should GO IMHO - but I have not yet reached it in
UI testing to confirm if other changes need to be made.

5.26 backports from 5.27

Fix unit test failures on MySQL 5.6 due to Custom Field table being created without Dynamic Row Format

Add in depreation notice and status check for a money value format configuration other than the default

Update to include issue link

Update to use CRM_Core_Error::deprecated function and mention deprecation notice on settings page

5.26.1 - Bump version. Add notes.

(Backport) #1681 - Update MySQL version notices

* The titles for PHP+MySQL notices should use the same
  capitalization/hyphenation ("Out-of-Date" vs "Out of date").
* Extract some more "%n" variables. Fix one errant variable.
* Reduce floweriness of the "version" / "at least" / "or later" text.
* Make it possible to add/remove the "+" notation without changing
  the ts() message.

#1794 Fix issue where unchecking a checkbox may not get reflected in the database

#1797 Fix jquery Credit card validation on front end contribu…

5.26.0 - Small edits

5.26.0 release notes final

Document recent merge in regards to select fields for export screen a…

Document recent merge in regards to select fields for export screen and add in the notice about WordPress compatability issue

#1725 Remove groups, tags and notes from the returned data fo…

#1725 Remove groups, tags and notes from the returned data for the usage in preview data to speed up loading of the select fields screen

Annotated 5.26 release notes

#1780 Fix bug where non-household merge contacts were being skipped

Add Upgrade Warning.  Limit to WP Only.