relax isApplicable validation-report checks

src/extensions/rcsb/validation-report/behavior.ts

@@ -340,7 +340,7 @@ export const ValidationReportDensityFitPreset = StructureRepresentationPresetPro
         description: 'Color structure based on density fit. Data from wwPDB Validation Report, obtained via RCSB PDB.'
     },
     isApplicable(a) {
-        return a.data.models.length === 1 && ValidationReport.isApplicable(a.data.models[0]) && Model.hasXrayMap(a.data.models[0]);
+        return a.data.models.length === 1 && ValidationReport.isApplicable(a.data.models[0]) && Model.isFromXray(a.data.models[0]) && Model.probablyHasDensityMap(a.data.models[0]);
     },
     params: () => StructureRepresentationPresetProvider.CommonParams,
     async apply(ref, params, plugin) {

src/extensions/rcsb/validation-report/color/density-fit.ts

@@ -67,7 +67,7 @@ export const DensityFitColorThemeProvider: ColorTheme.Provider<{}, ValidationRep
     factory: DensityFitColorTheme,
     getParams: () => ({}),
     defaultValues: PD.getDefaultValues({}),
-    isApplicable: (ctx: ThemeDataContext) => !!ctx.structure && ValidationReport.isApplicable(ctx.structure.models[0]) && Model.hasXrayMap(ctx.structure.models[0]),
+    isApplicable: (ctx: ThemeDataContext) => !!ctx.structure && ValidationReport.isApplicable(ctx.structure.models[0]) && Model.isFromXray(ctx.structure.models[0]) && Model.probablyHasDensityMap(ctx.structure.models[0]),
     ensureCustomProperties: {
         attach: (ctx: CustomProperty.Context, data: ThemeDataContext) => data.structure ? ValidationReportProvider.attach(ctx, data.structure.models[0], void 0, true) : Promise.resolve(),
         detach: (data) => data.structure && data.structure.models[0].customProperties.reference(ValidationReportProvider.descriptor, false)