pkp/pkp-lib#11825 Fix form visible locales for task and discussion forms (#880)

* pkp/pkp-lib#11825 Only add primary locale to visibleLocales if supportedFormLocales has more than 1 value

* pkp/pkp-lib#11825 Set locales when initializing form for tasks&discussions and templates

* pkp/pkp-lib#11825 Revert setting locales from task and discussion forms

* pkp/pkp-lib#11825 Only add pkpForm--hasManyVisibleLocales class if form hasMultilingualFields

Author: blesildaramirez

src/components/Form/Form.vue

@@ -185,7 +185,7 @@ export default {
 		 */
 		classes() {
 			let classes = [];
-			if (this.visibleLocales.length > 1) {
+			if (this.visibleLocales.length > 1 && this.hasMultilingualFields) {
 				classes.push('pkpForm--hasManyVisibleLocales');
 			}
 			return classes;