Polish.

Removed obselete actions from context menu in album tree view for Root and Parent collections.
Added KMessageBox showing error if someone tries to open Root in terminal or file manager.
BUGS:312627

digikam/album/albumpropsedit.cpp

@@ -273,7 +273,7 @@ AlbumPropsEdit::AlbumPropsEdit(PAlbum* const album, bool create)
         d->titleEdit->setText(i18n("New Album"));
         d->datePicker->setDate(QDate::currentDate());
         d->parentCombo->addItem(i18n("Selected Album (Default)"));
-        d->parentCombo->addItem(i18nc("top level folder of album","Root"));
+        d->parentCombo->addItem(i18nc("top level folder of album","Root of current collection"));
     }
     else
     {

digikam/album/albumselectiontreeview.cpp

@@ -119,12 +119,20 @@ public:
 
     virtual void addActions(AbstractAlbumTreeView*, ContextMenuHelper& cmh, Album* a)
     {
+        if (!a || a->isRoot())
+        {
+            return;
+        }
+        
         PAlbum* album = dynamic_cast<PAlbum*>(a);
 
-        if (!album)
+        if (album->isAlbumRoot())
         {
+            cmh.addActionNewAlbum(d->albumModificationHelper, album);
+            cmh.addAction("album_openinfilemanager");
+            cmh.addAction("album_openinterminal");
             return;
-        }
+        } 
 
         // --------------------------------------------------------
         cmh.addActionNewAlbum(d->albumModificationHelper, album);

digikam/views/digikamview.cpp

@@ -1060,6 +1060,13 @@ void DigikamView::slotAlbumOpenInFileManager()
 {
     Album* album = d->albumManager->currentAlbum();
 
+    if (album->isRoot())
+    {
+        KMessageBox::error(this,
+                           i18n("Cannot open the root. It is not a physical location."));
+        return;
+    }
+    
     if (!album || album->type() != Album::PHYSICAL)
     {
         return;
@@ -1074,6 +1081,13 @@ void DigikamView::slotAlbumOpenInTerminal()
 {
     Album* album = d->albumManager->currentAlbum();
 
+    if (album->isRoot())
+    {
+        KMessageBox::error(this,
+                           i18n("Cannot open the root. It is not a physical location."));
+        return;
+    }
+    
     if (!album || album->type() != Album::PHYSICAL)
     {
         return;