QmlDesigner: Fix for item library search filter

Without this patch the item library gets into an
invalid state if the user enters edit mode
with an ative search filter.
When going back to design mode the item library
is completely empty.

This patch clears the filter, so the item library
gets properly populated.

Change-Id: I21f823b8db820589dedd6ba4e4855678fff49e53
Reviewed-by: Tim Jenssen <tim.jenssen@qt.io>

src/plugins/qmldesigner/components/itemlibrary/itemlibraryview.cpp

@@ -65,6 +65,7 @@ WidgetInfo ItemLibraryView::widgetInfo()
 void ItemLibraryView::modelAttached(Model *model)
 {
     AbstractView::modelAttached(model);
+    m_widget->clearSearchFilter();
     m_widget->setModel(model);
     updateImports();
     model->attachView(m_importManagerView);
@@ -75,6 +76,7 @@ void ItemLibraryView::modelAboutToBeDetached(Model *model)
     model->detachView(m_importManagerView);
 
     AbstractView::modelAboutToBeDetached(model);
+
     m_widget->setModel(0);
 }
 

src/plugins/qmldesigner/components/itemlibrary/itemlibrarywidget.cpp

@@ -247,6 +247,11 @@ QString ItemLibraryWidget::qmlSourcesPath()
     return Core::ICore::resourcePath() + QStringLiteral("/qmldesigner/itemLibraryQmlSources");
 }
 
+void ItemLibraryWidget::clearSearchFilter()
+{
+    m_filterLineEdit->clear();
+}
+
 void ItemLibraryWidget::reloadQmlSource()
 {
     QString itemLibraryQmlFilePath = qmlSourcesPath() + QStringLiteral("/ItemsView.qml");

src/plugins/qmldesigner/components/itemlibrary/itemlibrarywidget.h

@@ -86,6 +86,8 @@ public:
     void setImportsWidget(QWidget *importsWidget);
 
     static QString qmlSourcesPath();
+    void clearSearchFilter();
+
 public slots:
     void setSearchFilter(const QString &searchFilter);
     void delayedUpdateModel();