Logbook: add Engine hours to summary

[lukarenko]

List engine hours for all engines on Log book Summary page

Description

If propulsion.*.runTime property is provided, list engine hours on Summary page

Note: if there are multiple engines (e.g. catamaran) then we add name of engine to display. Needs to be tested with such boat.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Improvement/refactoring (non-breaking change that doesn't add any feature but make things better)

[xbgmsharp]

Thanks great idea.