WPMU DEV - Appointments+ 2.4.2

- Fixed a problem with custom confirmation email.
- Fixed a problem with slot availability.
- Added plugin specific text to privacy policy page (only during creation a policy page).

- Fixed a problem with Service Provider shortcode param name.
- Fixed a problem with start hour for specific configurations.
- Fixed a problem with appointments intervals.
- Fixed a problem with time slots when an appointment has no provider in inline-edit.

- Added ability to show/hide columns on "Services" settings screen.
- Added ability to show/hide columns on "Service Provider" settings screen.
- Added asterisk to additional, required fields (pro only).
- Added columns "Paddings" and "Location" on "Service Providers" settings screen (pro only).
- Added columns "Paddings", "Location" and "Shared resources" on "Services" settings screen (pro only).
- Added locations on appointment form.
- Added SERVICE_LOCATION placeholder replaced by a service Location in email templates.
- Fixed time display format to selected in WordPress options.
- Improved "confirmation" checkbox on Service Provider Profile page.
- Improved Object Cache clear.