Fix string input when deleting its value

package-lock.json

package.json

src/client/workflow/services/WorkflowVersionService.ts

...ents/parameter-schema/form-mode/ParameterBooleanInput.vue

...ponents/parameter-schema/form-mode/ParameterEnumInput.vue

...ponents/parameter-schema/form-mode/ParameterFileInput.vue

src/components/parameter-schema/form-mode/ParameterInput.vue

...ents/parameter-schema/form-mode/ParameterMappingInput.vue

...nents/parameter-schema/form-mode/ParameterNumberInput.vue

...nts/parameter-schema/form-mode/ParameterResourceInput.vue

...nents/parameter-schema/form-mode/ParameterStringInput.vue

src/stores/workflows.ts