[Unified search] Fixes ally issues

src/plugins/unified_search/public/filter_bar/filter_editor/phrase_value_input.tsx

@@ -78,6 +78,10 @@ class PhraseValueInputUI extends PhraseSuggestorUI<PhraseValueInputProps> {
             id: 'unifiedSearch.filter.filterEditor.valueSelectPlaceholder',
             defaultMessage: 'Select a value',
           })}
+          aria-label={intl.formatMessage({
+            id: 'unifiedSearch.filter.filterEditor.valueSelectPlaceholder',
+            defaultMessage: 'Select a value',
+          })}
           options={options}
           getLabel={(option) => option}
           selectedOptions={value ? [valueAsStr] : []}

src/plugins/unified_search/public/filter_bar/filter_editor/phrases_values_input.tsx

@@ -54,6 +54,10 @@ class PhrasesValuesInputUI extends PhraseSuggestorUI<PhrasesValuesInputProps> {
             id: 'unifiedSearch.filter.filterEditor.valuesSelectPlaceholder',
             defaultMessage: 'Select values',
           })}
+          aria-label={intl.formatMessage({
+            id: 'unifiedSearch.filter.filterEditor.valuesSelectPlaceholder',
+            defaultMessage: 'Select values',
+          })}
           delimiter=","
           isCaseSensitive={true}
           options={options}

src/plugins/unified_search/public/filter_bar/filter_editor/value_input_type.tsx

@@ -50,6 +50,7 @@ class ValueInputTypeUI extends Component<Props> {
             disabled={this.props.disabled}
             fullWidth={this.props.fullWidth}
             placeholder={this.props.placeholder}
+            aria-label={this.props.placeholder}
             value={value}
             onChange={this.onChange}
             isInvalid={!validateParams(value, this.props.field)}
@@ -67,6 +68,7 @@ class ValueInputTypeUI extends Component<Props> {
             disabled={this.props.disabled}
             fullWidth={this.props.fullWidth}
             placeholder={this.props.placeholder}
+            aria-label={this.props.placeholder}
             value={this.getValueForNumberField(value)}
             onChange={this.onChange}
             controlOnly={this.props.controlOnly}
@@ -83,6 +85,7 @@ class ValueInputTypeUI extends Component<Props> {
             disabled={this.props.disabled}
             fullWidth={this.props.fullWidth}
             placeholder={this.props.placeholder}
+            aria-label={this.props.placeholder}
             value={value}
             onChange={this.onChange}
             onBlur={this.onBlur}
@@ -100,6 +103,7 @@ class ValueInputTypeUI extends Component<Props> {
             fullWidth={this.props.fullWidth}
             disabled={this.props.disabled}
             placeholder={this.props.placeholder}
+            aria-label={this.props.placeholder}
             value={value}
             onChange={this.onChange}
             isInvalid={!isEmpty(value) && !validateParams(value, this.props.field)}
@@ -132,6 +136,7 @@ class ValueInputTypeUI extends Component<Props> {
             ]}
             value={value}
             onChange={this.onBoolChange}
+            aria-label={this.props.placeholder}
             className={this.props.className}
             fullWidth={this.props.fullWidth}
             compressed={this.props.compressed}

src/plugins/unified_search/public/filters_builder/filter_item/field_input.tsx

@@ -84,6 +84,7 @@ export function FieldInput({ field, dataView, onHandleField }: FieldInputProps)
         placeholder={strings.getFieldSelectPlaceholderLabel()}
         sortMatchesBy="startsWith"
         singleSelection={{ asPlainText: true }}
+        aria-label={strings.getFieldSelectPlaceholderLabel()}
         isClearable={false}
         compressed
         fullWidth

src/plugins/unified_search/public/filters_builder/filter_item/filter_item.tsx

@@ -240,6 +240,7 @@ export function FilterItem({
                       })}
                     >
                       <EuiFlexItem
+                        role="button"
                         grow={false}
                         aria-label={strings.getDragFilterAriaLabel()}
                         {...provided.dragHandleProps}

src/plugins/unified_search/public/filters_builder/filter_item/operator_input.tsx

@@ -51,6 +51,7 @@ export function OperatorInput<TParams = unknown>({
       compressed
       isDisabled={!field || disabled}
       placeholder={strings.getOperatorSelectPlaceholderSelectLabel()}
+      aria-label={strings.getOperatorSelectPlaceholderSelectLabel()}
       options={operators}
       selectedOptions={operator ? [operator] : []}
       getLabel={({ message }) => message}