fix: LEAP-724: Fix Textarea required + skipDuplicates (HumanSignal#1705)

* Adjust test to fail with required + skipDuplicates

* Fix test to really see the problem

* Run only this test for now

* Rename validateValue in Textarea to fix validation

This method is used to validate text when it's added by user,
not to validate the entire value of Textarea result, it has different signature.
We could adjust it to validate duplicated texts on submit, but that's improvement
and we need just a fix right now.

* Return all tests

* Unrelated doc for displayMode param + fix FF comment

* Fix linting and line endings in some tests

ocr + textarea.skip-duplicates

* Fix Textarea editing

* One more missed thing

e2e/tests/ocr.test.js

@@ -154,7 +154,7 @@ Scenario('Drawing multiple blank regions and then attaching labels', async ({ I,
     'ff_front_1170_outliner_030222_short': true,
   });
   I.amOnPage('/');
-  LabelStudio.init({ config: createConfig( ), data });
+  LabelStudio.init({ config: createConfig(), data });
   AtImageView.waitForImage();
   AtSettings.open();
   AtSettings.setGeneralSettings({
@@ -192,12 +192,12 @@ Scenario('Drawing multiple blank regions and then attaching labels', async ({ I,
   }
   session('Deserialization', () => {
     I.amOnPage('/');
-    LabelStudio.init({ config: createConfig( ), data, annotations: [{ id: 'test', result: results }] });
+    LabelStudio.init({ config: createConfig(), data, annotations: [{ id: 'test', result: results }] });
     AtImageView.waitForImage();
     AtOutliner.seeRegions(regions.length);
     for (const [idx, region] of Object.entries(regions)) {
       if (region.text) {
-        I.seeInField(AtOutliner.locateRegionIndex((+idx)+1).find('.lsf-textarea-tag__input'), region.text);
+        I.seeInField(AtOutliner.locateRegionIndex((+idx) + 1).find('.lsf-textarea-tag__input'), region.text);
       }
     }
   });