Debugger: Fix context menu item text

As it is possible to delete more than one selected breakpoint it
should be indicated in the menu.

Change-Id: Iabf6d4313e65bb65d7e822b05f448f459a7ae3a5
Reviewed-by: hjk <hjk@theqtcompany.com>
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@theqtcompany.com>

src/plugins/debugger/breakwindow.cpp

@@ -743,7 +743,7 @@ void BreakTreeView::contextMenuEvent(QContextMenuEvent *ev)
     Breakpoints selectedItems = handler->findBreakpointsByIndex(selectedIndices);
 
     const int rowCount = model()->rowCount();
-    auto deleteAction = new QAction(tr("Delete Breakpoint"), &menu);
+    auto deleteAction = new QAction(tr("Delete Selected Breakpoints"), &menu);
     deleteAction->setEnabled(!selectedItems.empty());
 
     auto deleteAllAction = new QAction(tr("Delete All Breakpoints"), &menu);