New: Tooltips for remove actions

Co-Authored-By: Mark McDowall <markus101@users.noreply.github.com>

frontend/src/System/Backup/BackupRow.js

@@ -114,6 +114,7 @@ class BackupRow extends Component {
           />
 
           <IconButton
+            title="Delete backup"
             name={icons.DELETE}
             onPress={this.onDeletePress}
           />

frontend/src/System/Tasks/Queued/QueuedTaskRow.js

@@ -224,6 +224,7 @@ class QueuedTaskRow extends Component {
           {
             status === 'queued' &&
               <IconButton
+                title="Removed from task queue"
                 name={icons.REMOVE}
                 onPress={this.onCancelPress}
               />