- exercise editor site test file upload, attach, detach, download file is working

i18n/en.ts

i18n/i18nRoot.ts

src/communicationLayer/exerciseEditorLayer.ts

...tsPanel/dialog/customTestsDialog/changeCustomTestView.tsx

...doExerciseSite/testsPanel/viewTestDialog/viewTestView.tsx

...omProjectSite/dialogs/changeTestDialog/changeTestView.tsx

...nts/sites/editCustomProjectSite/editCustomProjectSite.tsx

...rciseEditorSite/addAssetFilesModal/addAssetFilesModal.tsx

...s/exerciseEditorSite/assetsPanel/assetsPanelHeaderBar.tsx

...omponents/sites/exerciseEditorSite/exerciseEditorSite.tsx

...eEditorSite/exerciseTestsPanel/dialogs/changeTestView.tsx

...erciseTestsPanel/dialogs/compareFilesTestSettingsView.tsx

...itorSite/exerciseTestsPanel/dialogs/testFilesListView.tsx

src/components/sites/exerciseEditorSite/headerBarContent.tsx

src/constants.ts

src/helpers/convertersAndTransformers.ts

...dialogs/changeCustomTestDialog/changeCustomTestActions.ts

...changeCustomProjectTestDialog/customProjectTestActions.ts

...eEditorSite/dialogs/changeTestDialog/changeTestActions.ts

...e/actions/exerciseEditorSite/exerciseEditorCrudActions.ts