Adds some tooltips to buttons in chat rooms window.

resources/languages/resources.properties

@@ -109,6 +109,8 @@ service.gui.CHAT_ROOM_USER_JOINED=has joined {0}
 service.gui.CHAT_ROOM_USER_LEFT=has left {0}
 service.gui.CHAT_ROOM_USER_KICKED=has been kicked from {0}
 service.gui.CHAT_ROOM_USER_QUIT=has quit {0}
+service.gui.CHAT_ROOM_SAVE_BUTTON_TOOLTIP=Saves chat room for future use
+service.gui.CHAT_ROOM_REMOVE_BUTTON_TOOLTIP=Removes selected room from the list of saved rooms
 service.gui.CHAT_ROOM_NAME=Chat room name
 service.gui.CLEAR_CUSTOM_MESSAGES=Clear custom messages
 service.gui.ROOM_NAME=Chat Room

src/net/java/sip/communicator/impl/gui/main/chatroomslist/ChatRoomTableDialog.java

@@ -68,7 +68,7 @@ public class ChatRoomTableDialog
      */
     private final JButton okButton
         = new JButton(
-                GuiActivator.getResources().getI18NString("service.gui.OK"));
+                GuiActivator.getResources().getI18NString("service.gui.JOIN"));
 
     /**
      * The cancel button.
@@ -233,6 +233,13 @@ else if(roomsCombo.getSelectedIndex() == -1
         okButton.addActionListener(this);
         cancelButton.addActionListener(this);
 
+        addButton.setToolTipText(GuiActivator.getResources()
+            .getI18NString("service.gui.CHAT_ROOM_SAVE_BUTTON_TOOLTIP"));
+        removeButton.setToolTipText(GuiActivator.getResources()
+            .getI18NString("service.gui.CHAT_ROOM_REMOVE_BUTTON_TOOLTIP"));
+        okButton.setToolTipText(GuiActivator.getResources()
+            .getI18NString("service.gui.JOIN_CHAT_ROOM"));
+
         addButton.setEnabled(false);
         removeButton.setEnabled(false);