Add error tracking code for fetches

...s/mainPage/visualisations/TargetsTree/TargetsSunburst.vue

...s/report_cards/chemical_probe/ChemicalProbeReportCard.vue

...report_cards/chemical_probe/CompoundCrystalStructures.vue

.../shared/CrystalStructures/PDBeRepresentativeStructure.vue

...ort_cards/shared/CrystalStructures/PDBeVisualisations.vue

...shared/SingleItemProperties/PropertiesValuesInColumns.vue

...nts/report_cards/target/ActivityCharts/ActivityCharts.vue

...ts/report_cards/target/ProbesAndChemogenomicCompounds.vue

components/report_cards/target/TargetCrystalStructures.vue

components/report_cards/target/TargetReportCard.vue

components/search_results/free_text/FreeTextResults.vue

nuxt.config.js

pages/privacy_notice.vue

store/probe/probeSummary.js

store/target/nameAndClassification.js

web-components-submodule