Make the time before showing the splash when opening a mailfolder on imap configurable in the ini.

BUG: 116773 

svn path=/branches/KDE/3.5/kdepim/; revision=488792

kmail.kcfg

@@ -109,6 +109,9 @@
         <default>0</default>
 	<min>0</min>
       </entry>
+      <entry name="FolderLoadingTimeout" type="Int" hidden="true">
+         <default>1000</default>
+      </entry>
    
 
     </group>

kmmainwidget.cpp

@@ -1787,10 +1787,10 @@ void KMMainWidget::folderSelected( KMFolder* aFolder, bool forceJumpToUnread )
       mForceJumpToUnread = forceJumpToUnread;
 
       // Set a timer to show a splash screen if fetching folder contents
-      // takes more than a second
+      // takes more than the amount of seconds configured in the kmailrc (default 1000 msec)
       mShowBusySplashTimer = new QTimer( this );
       connect( mShowBusySplashTimer, SIGNAL( timeout() ), this, SLOT( slotShowBusySplash() ) );
-      mShowBusySplashTimer->start( 1000, true );
+      mShowBusySplashTimer->start( GlobalSettings::self()->folderLoadingTimeout(), true );
       return;
     } else {
       // the folder is complete now - so go ahead