Migrate favorite folder view from kmail to akonadi [DONE]


Migrate some config to akonadi:

  mUseCustomIcons = configGroup.readEntry( "UseCustomIcons", false ); [DONE]
  mNormalIconPath = configGroup.readEntry( "NormalIconPath" ); [DONE]
  mUnreadIconPath = configGroup.readEntry( "UnreadIconPath" ); [DONE]

  mHideInSelectionDialog = configGroup.readEntry( "HideInSelectionDialog", false );
We use now Collection::Id(); and not idString();

Port shortcut [DONE]


Migrate color config
=> from [Reader] to [MessageListView::Colors] (done in kmail-udp id=4.4-akonadi)
        NewMessage  to NewMessageColor
        UnreadMessage to UnreadMessageColor
        FlagMessage to ImportantMessageColor
        ToActMessage to TodoMessageColor

=> from [Reader] to [MessageListView::Fonts] (done in kmail-udp id = 4.4-akonadi)
        list-font to MessageListFont
        list-important-font to ImportantMessageFont
        list-new-font to NewMessageFont
        list-unread-font to UnreadMessageFont
        list-toact-font to TodoMessageFont

=> from [MessageListView]
        DisplayMessageToolTips to MessageToolTipEnabled (done in kmail-udp id=4.4-akonadi)
        HideTabBarWithSingleTab to AutoHideTabBarWithSingleTab (done in kmail-udp id = 4.4-akonadi)

from [Reader] to [Reader] (rename just item)
        showColorbar  to showColorBar (done in kmail-udp id=4.4-akonadi)
 
