[Qt] Fix coin control qt5 checkbox bug in tree mode

src/qt/coincontroldialog.cpp

@@ -386,6 +386,18 @@ void CoinControlDialog::viewItemChanged(QTreeWidgetItem* item, int column)
         if (ui->treeWidget->isEnabled()) // do not update on every click for (un)select all
             CoinControlDialog::updateLabels(model, this);
     }
+
+    // todo: this is a temporary qt5 fix: when clicking a parent node in tree mode, the parent node
+    //       including all childs are partially selected. But the parent node should be fully selected
+    //       as well as the childs. Childs should never be partially selected in the first place.
+    //       Please remove this ugly fix, once the bug is solved upstream.
+#if QT_VERSION >= 0x050000
+    else if (column == COLUMN_CHECKBOX && item->childCount() > 0)
+    {
+        if (item->checkState(COLUMN_CHECKBOX) == Qt::PartiallyChecked && item->child(0)->checkState(COLUMN_CHECKBOX) == Qt::PartiallyChecked)
+            item->setCheckState(COLUMN_CHECKBOX, Qt::Checked);
+    }
+#endif
 }
 
 // return human readable label for priority number