Binner v2.5.7

Binner public release

• adds support for custom part type icons (in Edit view only)
• Fixes an obscure bug that was discovered by @TWM617 - if a configuration section is missing (such as newly introduced integrations) it should not be defaulted to true. The new configuration validation feature revealed this problem as it validates enabled integration apis for proper settings on startup.

Full Changelog: v2.5.6...v2.5.7