compiler: compile js when .props are in the pod

Ensure that the JS compiler runs when a pod does not have @js types
but there are .props file present. This ensure that localized props
and other configuration props are written to the pod.

src/compiler/fan/steps/CompileJs.fan

@@ -58,6 +58,9 @@ class CompileJs  : CompilerStep
     // are we forcing generation of js for all types
     if (compiler.input.forceJs) return true
 
+    // are there any props files that need to be written to JS?
+    if (compiler.resFiles?.any |file| { file.ext == "props" } ?: false) return true
+
     // run JS compiler if any type has @Js facet
     return compiler.types.any { it.hasFacet("sys::Js") }
   }