[raster] allow multiple row deletion in the singleband pseudo-color UI

Author: nirvn

src/gui/raster/qgssinglebandpseudocolorrendererwidget.cpp

@@ -315,10 +315,16 @@ void QgsSingleBandPseudoColorRendererWidget::on_mAddEntryButton_clicked()
 
 void QgsSingleBandPseudoColorRendererWidget::on_mDeleteEntryButton_clicked()
 {
-  QTreeWidgetItem* currentItem = mColormapTreeWidget->currentItem();
-  if ( currentItem )
+  QList<QTreeWidgetItem *> itemList;
+  itemList = mColormapTreeWidget->selectedItems();
+  if ( itemList.isEmpty() )
+  {
+    return;
+  }
+
+  Q_FOREACH ( QTreeWidgetItem *item, itemList )
   {
-    delete currentItem;
+    delete item;
   }
   emit widgetChanged();
 }

src/ui/qgssinglebandpseudocolorrendererwidgetbase.ui

@@ -127,7 +127,7 @@
      <item>
       <widget class="QPushButton" name="mDeleteEntryButton">
        <property name="toolTip">
-        <string>Remove selected row</string>
+        <string>Remove selected row(s)</string>
        </property>
        <property name="icon">
         <iconset resource="../../images/images.qrc">