Change hint for multiple datasets to be clear that single input is allowed

Summary of Changes

Changes the hint for a Multiple Dataset input from "Multiple Datasets" to "Dataset(s)" to be clearer that a single dataset is allowed as an input along with multiple datasets.

Checklist

• The MR has a clear and concise title
• Code is self-documented and follows style guidelines.
• Automated tests are written and pass successfully.
• Regression tests (e.g. manually triggered system tests, manual GUI/tool tests, ...) are performed to make sure the MR does not break anything (when applicable)
• Readme file is present and up-to-date.

Documentation Updates

Additional Notes

Closes #123 (closed)

client/src/components/Form/Elements/FormData/FormData.test.js

@@ -114,7 +114,7 @@ describe("FormData", () => {
         const options = wrapper.find(".btn-group").findAll("button");
         expect(options.length).toBe(3);
         expect(options.at(0).classes()).toContain("active");
-        expect(options.at(0).attributes("title")).toBe("Multiple datasets");
+        expect(options.at(0).attributes("title")).toBe("Dataset(s)");
         expect(wrapper.emitted().input[0][0]).toEqual({
             batch: false,
             product: false,
@@ -451,7 +451,7 @@ describe("FormData", () => {
         const selectedValues = wrapper.findAll(SELECTED_VALUE);
         expect(selectedValues.length).toBe(1);
         expect(selectedValues.at(0).text()).toBe("5: hdcaName5");
-        await wrapper.find("[title='Multiple datasets'").trigger("click");
+        await wrapper.find("[title='Dataset(s)'").trigger("click");
         expect(options.at(0).classes()).toContain("active");
         expect(wrapper.emitted().input[2][0]).toEqual(null);
     });