Update missing @since for 7.7

Change-Id: I9c35e50fd4b56c6b70a4194526cbbbe7870add6e

client/src/main/java/com/vaadin/client/widget/grid/events/GridEnabledEvent.java

@@ -20,7 +20,7 @@ import com.google.gwt.event.shared.GwtEvent;
 /**
  * An enabled/disabled event, fired by the Grid when it is disabled or enabled.
  *
- * @since
+ * @since 7.7
  * @author Vaadin Ltd
  */
 public class GridEnabledEvent extends GwtEvent<GridEnabledHandler> {

client/src/main/java/com/vaadin/client/widget/grid/events/GridEnabledHandler.java

@@ -18,10 +18,10 @@ package com.vaadin.client.widget.grid.events;
 import com.google.gwt.event.shared.EventHandler;
 
 /**
- * Handler for a Grid enabled/disabled event, called when the Grid is enabled
- * or disabled.
+ * Handler for a Grid enabled/disabled event, called when the Grid is enabled or
+ * disabled.
  *
- * @since
+ * @since 7.7
  * @author Vaadin Ltd
  */
 public interface GridEnabledHandler extends EventHandler {
@@ -30,7 +30,8 @@ public interface GridEnabledHandler extends EventHandler {
      * Called when Grid is enabled or disabled.
      *
      * @param enabled
-     *         true if status changes from disabled to enabled, otherwise false.
+     *            true if status changes from disabled to enabled, otherwise
+     *            false.
      */
     public void onEnabled(boolean enabled);
 }

client/src/main/java/com/vaadin/client/widgets/Grid.java

@@ -3011,7 +3011,7 @@ public class Grid<T> extends ResizeComposite implements
         /**
          * Sets whether the selection column is enabled.
          *
-         * @since
+         * @since 7.7
          * @param enabled <code>true</code> to enable the column,
          *                <code>false</code> to disable it.
          */

server/src/main/java/com/vaadin/server/KeyMapper.java

@@ -97,7 +97,7 @@ public class KeyMapper<V> implements Serializable {
     /**
      * Checks if the given key is mapped to an object.
      * 
-     * @since
+     * @since 7.7
      * 
      * @param key
      *            the key to check

server/src/main/java/com/vaadin/server/VaadinServlet.java

@@ -979,7 +979,7 @@ public class VaadinServlet extends HttpServlet implements Constants {
      * Finds the given resource from the web content folder or using the class
      * loader.
      * 
-     * @since
+     * @since 7.7
      * @param filename
      *            The file to find, starting with a "/"
      * @return The URL to the given file, or null if the file was not found