[ADF-1547] tooltip fixes and enhancements (#2333)

* tooltip enhancements

* fix unit tests

ng2-components/ng2-alfresco-datatable/src/components/datatable/filesize-cell.component.ts

@@ -0,0 +1,32 @@
+/*!
+ * @license
+ * Copyright 2016 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 { ChangeDetectionStrategy, Component, ViewEncapsulation } from '@angular/core';
+import { DataTableCellComponent } from './datatable-cell.component';
+
+@Component({
+    selector: 'adf-filesize-cell',
+    changeDetection: ChangeDetectionStrategy.OnPush,
+    template: `
+        <ng-container>
+            <span [title]="tooltip">{{ value | adfFileSize }}</span>
+        </ng-container>
+    `,
+    encapsulation: ViewEncapsulation.None,
+    host: { class: 'adf-filesize-cell' }
+})
+export class FileSizeCellComponent extends DataTableCellComponent {}