Backport of trunk commit 843864 (sorry, missed the 4.1.1 tagging deadline):

Set the destination folder for a new account, so that the inbox will appear
if it was previously hidden.

CCBUG:168544

svn path=/branches/KDE/4.1/kdepim/; revision=853907

accountmanager.cpp

@@ -260,6 +260,10 @@ void AccountManager::add( KMAccount *account )
 {
   if ( account ) {
     mAcctList.append( account );
+
+    KMFolder *folder = account->folder();		// init folder's account list
+    if ( folder && !folder->hasAccounts() ) account->setFolder( folder, true );
+
     emit accountAdded( account );
     account->installTimer();
   }

kmfoldertree.cpp

@@ -425,6 +425,9 @@ void KMFolderTree::connectSignals()
   connect(kmkernel->acctMgr(), SIGNAL(accountRemoved(KMAccount*)),
           this, SLOT(slotAccountRemoved(KMAccount*)));
 
+  connect(kmkernel->acctMgr(), SIGNAL(accountAdded(KMAccount*)),
+          this, SLOT(slotUnhideLocalInbox()));
+
   connect(kmkernel->searchFolderMgr(), SIGNAL(folderRemoved(KMFolder*)),
           this, SLOT(slotFolderRemoved(KMFolder*)));