Fixing bug 129693. Adding tooltip to GetMap button to make functionality of the widget clear to the end user. r=ssu, sr=mscott, a=asa

mailnews/addrbook/resources/content/abCardViewOverlay.xul

@@ -61,7 +61,7 @@ Rights Reserved.
               <description class="CardViewText" id="cvHomeCountry"/>
             </vbox>
             <vbox id="cvbHomeMapItBox" pack="end">
-              <button id="cvHomeMapIt" url="" label="&mapItButton.label;" onclick="MapIt('cvHomeMapIt');"/>
+              <button id="cvHomeMapIt" url="" label="&mapItButton.label;" onclick="MapIt('cvHomeMapIt');" tooltiptext="&mapIt.tooltip;"/>
             </vbox>
           </hbox>
           <description class="CardViewLink" id="cvHomeWebPageBox">
@@ -115,7 +115,7 @@ Rights Reserved.
                                             <description class="CardViewText" id="cvWorkCountry"/>
                                           </vbox>
                                           <vbox id="cvbWorkMapItBox" pack="end">
-                                            <button id="cvWorkMapIt" url="" label="&mapItButton.label;" onclick="MapIt('cvWorkMapIt');"/>
+                                            <button id="cvWorkMapIt" url="" label="&mapItButton.label;" onclick="MapIt('cvWorkMapIt');" tooltiptext="&mapIt.tooltip;"/>
                                           </vbox>
                                         </hbox>
                                         <description class="CardViewLink" id="cvWorkWebPageBox">

mailnews/addrbook/resources/locale/en-US/abCardViewOverlay.dtd

@@ -28,4 +28,6 @@ Rights Reserved.
 <!ENTITY addresses.heading "Addresses">
 <!-- For Map It! -->
 <!ENTITY mapItButton.label "Get Map">
+<!ENTITY mapIt.tooltip "Display a map of this address from the Web">
+