Bug #261883 --> Adding new RSS feed doesn't store it in the selected folder

add a menu fly out for choosing container folders that have subfolders.

mail/extensions/newsblog/content/feed-properties.js

@@ -59,7 +59,7 @@ function onOk()
   feedLocation = feedLocation.replace( /^\s+/, "").replace( /\s+$/, ""); 
 
   window.arguments[0].feedLocation = feedLocation;
-  window.arguments[0].folderURI = document.getElementById('selectFolder').value;
+  window.arguments[0].folderURI = document.getElementById('selectFolder').getAttribute("uri");; 
   window.arguments[0].quickMode = document.getElementById('quickMode').checked;
   window.arguments[0].result = true;
 

mail/extensions/newsblog/content/feed-properties.xul

@@ -84,14 +84,17 @@
                 <menupopup>
                   <menu uri="..."
                         class="folderMenuItem menu-iconic"
-                        oncommand="PickedMsgFolder(event.target,'selectFolder')"
                         SpecialFolder="rdf:http://home.netscape.com/NC-rdf#SpecialFolder"
                         BiffState="rdf:http://home.netscape.com/NC-rdf#BiffState"
                         IsServer="rdf:http://home.netscape.com/NC-rdf#IsServer"
                         IsSecure="rdf:http://home.netscape.com/NC-rdf#IsSecure"
                         ServerType="rdf:http://home.netscape.com/NC-rdf#ServerType"
                         label="rdf:http://home.netscape.com/NC-rdf#Name">
-			              <menupopup class="menulist-menupopup"/>
+			              <menupopup class="menulist-menupopup">
+                      <menuitem label="&choosethisfolder.label;"
+                                oncommand="PickedMsgFolder(event.target.parentNode.parentNode,'selectFolder')"/>
+                      <menuseparator/>
+                    </menupopup>
                   </menu>
                 </menupopup>
               </rule>

mail/extensions/newsblog/locale/feed-properties.dtd

@@ -1,12 +0,0 @@
-<!-- Feed Properties Dialog -->
-<!ENTITY window.title "News Feed Properties">
-
-<!ENTITY feedFolder.label "Store Feed Articles in: ">
-<!ENTITY feedFolder.accesskey "S">
-
-<!ENTITY feedLocation.label "Feed URL: ">
-<!ENTITY feedLocation.accesskey "F">
-
-<!ENTITY quickMode.label "Show the article summary instead of loading the web page">
-<!ENTITY quickMode.accesskey "h">
-