EditorManager: Introduce a DoNotRaise EditorManager::OpenEditorFlag

In some situations it might be beneficial to set up the editor
as usual but do not raise the application window.

This is opt-in, existing behavior is not affected.

Task-number: QTCREATORBUG-12769
Change-Id: If9826717bba06283187d10073c02a748b638c3f8
Reviewed-by: Eike Ziller <eike.ziller@qt.io>

src/plugins/coreplugin/editormanager/editormanager.cpp

@@ -1543,6 +1543,7 @@ IEditor *EditorManagerPrivate::activateEditor(EditorView *view, IEditor *editor,
                             ModeManager::activateMode(Constants::MODE_EDIT);
                 }
                 editor->widget()->setFocus();
+                if (!(flags & EditorManager::DoNotRaise))
                     ICore::raiseWindow(editor->widget());
             }
         }

src/plugins/coreplugin/editormanager/editormanager.h

@@ -81,7 +81,8 @@ public:
         OpenInOtherSplit = 16,
         DoNotSwitchToDesignMode = 32,
         DoNotSwitchToEditMode = 64,
-        SwitchSplitIfAlreadyVisible = 128
+        SwitchSplitIfAlreadyVisible = 128,
+        DoNotRaise = 256
     };
     Q_DECLARE_FLAGS(OpenEditorFlags, OpenEditorFlag)