Some macros can not be resolved in action URLs

[bobapple]

Describe the bug

Using $host.state.last_state_change$ macro for action URLs breaks the detail view of affected hosts with the following error message:

Icinga\Module\Icingadb\Web\Navigation\Action::resolveMacro(): Return value must be of type string, DateTime returned

To Reproduce

1. Creat a new Navigation Item of the type "Host Action" or "Service Action"
2. Use the macro $host.state.last_state_change$ in the URL field
3. Open detail view of affected Host or Service

Your Environment

• Icinga Web version: 2.12.1
• Icinga DB Web version: 1.1.3

Additional context

ref/IP/56978

[yhabteab]

This is an Icing DB Web thing :)!