[ADF-4865] Upload Dialog - row actions not accessible by keyboard alone (#5051)

* access upload dialog information by keyboard

* upload files actions keyboard accessibility

* aria labels translation keys

* refractor styling

* toggle action icons

* update docs

* e2e

* e2e update action reference

lib/content-services/upload/directives/toggle-icon.directive.ts

@@ -0,0 +1,62 @@
+/*!
+ * @license
+ * Copyright 2019 Alfresco Software, Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import { Directive, HostListener } from '@angular/core';
+
+@Directive({
+    selector: '[adf-toggle-icon]',
+    exportAs: 'toggleIcon'
+})
+export class ToggleIconDirective {
+    private isFocus: boolean = false;
+    private toggle: boolean = false;
+
+    @HostListener('mouseenter') onMouseEnter() {
+        if (!this.isFocus) {
+            this.toggle = true;
+        }
+    }
+
+    @HostListener('mouseleave') onMouseLeave() {
+        if (!this.isFocus) {
+            this.toggle = false;
+        }
+
+        if (this.isFocus && this.toggle) {
+            this.isFocus = false;
+            this.toggle = false;
+        }
+    }
+
+    @HostListener('focus') onFocus() {
+        this.isFocus = true;
+        this.toggle = true;
+    }
+
+    @HostListener('blur') onBlur() {
+        this.isFocus = false;
+        this.toggle = false;
+    }
+
+    get isToggled(): boolean {
+        return this.toggle;
+    }
+
+    get isFocused(): boolean {
+        return this.isFocus;
+    }
+}