Update @since tags for new API (#14330)

Change-Id: Ieee79bc4e1c61c7a0b00e19c0bca8826b0e10cff

client/src/com/vaadin/client/DeferredWorker.java

  * scheduled to be executed in the near future and that the framework should
  * wait for this work to complete before assuming the UI has reached a steady
  * state.
+ * 
+ * @since 7.3
+ * @author Vaadin Ltd
  */
 public interface DeferredWorker {
     /**

client/src/com/vaadin/client/Util.java

     /**
      * Defers the execution of {@link #runWebkitOverflowAutoFix(Element)}
      * 
-     * @since
+     * @since 7.2.6
      * @param elem
      *            with overflow auto
      */
      * necessary in cases where IE "forgets" to update child elements when they
      * resize.
      *
-     * @since
+     * @since 7.3
      * @param e
      *            The element to perform the hack on
      */
      *            performed. This may be "forward" or "backward", or "none" if
      *            the direction is unknown or irrelevant.
      * 
-     * @since
+     * @since 7.3
      */
     public native static void setSelectionRange(Element elem, int pos,
             int length, String direction)
      * string representation.<br/>
      * Eg. 50%, 123px, ...
      *
-     * @since
+     * @since 7.2.6
      * @author Vaadin Ltd
      */
     @SuppressWarnings("serial")
         /**
          * Gets the unit value by its type.
          *
-         * @since
          * @param type
          *            the type of the unit as found in the style.
          * @return the unit value.
         /**
          * Creates a {@link CssSize} using a value and its measurement unit.
          *
-         * @since
          * @param value
          *            the value.
          * @param unit
         /**
          * Check whether the two sizes are equals.
          *
-         * @since
          * @param cssSize1
          *            the first size to compare.
          * @param cssSize2

client/src/com/vaadin/client/ui/VFilterSelect.java

         /**
          * Select the first item of the suggestions list popup.
          * 
-         * @since
+         * @since 7.2.6
          */
         public void selectFirstItem() {
             debug("VFS.SP: selectFirstItem()");
         /**
          * Select the last item of the suggestions list popup.
          * 
-         * @since
+         * @since 7.2.6
          */
         public void selectLastItem() {
             debug("VFS.SP: selectLastItem()");
          * menu currently displays the last page with less items then the
          * maximum visibility (in which case the scroll is not active, but the
          * scroll is active for any other page in general).
+         * 
+         * @since 7.2.6
          */
         @Override
         public boolean isScrollActive() {

client/src/com/vaadin/client/ui/VScrollTable.java

     }
 
     /**
-     * @since
+     * @since 7.2.6
      */
     public void onUnregister() {
         if (addCloseHandler != null) {

client/src/com/vaadin/client/ui/VTabsheet.java

         /**
          * Delegate method for the onFocus event occurring on Tab.
          *
-         * @since
+         * @since 7.2.6
          * @param newFocusTab
          *            the new focused tab.
          * @see #onBlur(Tab)

client/src/com/vaadin/client/ui/menubar/MenuBar.java

     /**
      * Gets the first item from the menu or null if no items.
      * 
-     * @since
+     * @since 7.2.6
      * @return the first item from the menu or null if no items.
      */
     public MenuItem getFirstItem() {
     /**
      * Gest the last item from the menu or null if no items.
      * 
-     * @since
+     * @since 7.2.6
      * @return the last item from the menu or null if no items.
      */
     public MenuItem getLastItem() {
     /**
      * Gets the index of the selected item.
      * 
-     * @since
+     * @since 7.2.6
      * @return the index of the selected item.
      */
     public int getSelectedIndex() {
     /**
      * Scroll the selected item into view.
      * 
-     * @since
+     * @since 7.2.6
      */
     public void scrollSelectionIntoView() {
         scrollItemIntoView(selectedItem);
     /**
      * Sets the menu scroll enabled or disabled.
      * 
-     * @since
+     * @since 7.2.6
      * @param enabled
      *            the enabled state of the scroll.
      */
     /**
      * Gets whether the scroll is activate for this menu.
      * 
-     * @since
+     * @since 7.2.6
      * @return true if the scroll is active, otherwise false.
      */
     public boolean isScrollActive() {
     /**
      * Gets the preferred height of the menu.
      * 
-     * @since
+     * @since 7.2.6
      */
     protected int getPreferredHeight() {
         return table.getOffsetHeight();