pfSense

Set picture widget download file ext. Fixes #15767

Handle null widget instance ID. Issue #15844

Fix config access regressions during config upgrades

- 122_to_123: outbound rule saved to wrong path
- 130_to_131: operate on same types
- 136_to_137: handle potentially empty path
- 150_to_151: operate on same types
- 169_to_170: save the new wireless interface name

Don't use config result by reference

The $settings variable is not changed within the loop.

Refine widget validation checks. Fixes #15844

Config access regession when restoring from config 19.1. Fix #15895

Update nginx HTTP2 syntax. Fixes #15863

Define PHP request_order. Fixes #15893

Config access regression when saving dnsmasq overrides. Fix #15890

Dashboard widget settings and widgetkey validation. Issue #15844

• Adds validation of submitted widgetkey values before use when storing widget settings and other similar operations.
• Adds validation of widget settings which were not already validated.