QmlDesigner: Avoid error messages when adding effect

* Removing the summary page
* Adding DoNotOpenFile option

By default, the wizard expects to open a file.
Setting DoNotOpenFile to true does suppress this.

(cherry picked from commit 7b9303007a)

Task-number: QDS-8151
Change-Id: I62264733788dbbe1b017beaa428356548a1a3692
Reviewed-by: Tim Jenssen <tim.jenssen@qt.io>

share/qtcreator/qmldesigner/studio_templates/files/effect/wizard.json

@@ -11,7 +11,10 @@
     "enabled": "%{JS: value('Features').indexOf('QmlDesigner.Wizards.Enterprise') >= 0}",
     "featuresRequired": [ "QmlDesigner.Wizards.Enterprise" ],
 
-    "options": { "key": "DefaultSuffix", "value": "qep" },
+    "options": [
+        { "key": "DefaultSuffix", "value": "qep" },
+        { "key": "DoNotOpenFile", "value": "true" }
+    ],
 
     "pages" :
     [
@@ -19,11 +22,6 @@
             "trDisplayName": "Location",
             "trShortTitle": "Location",
             "typeId": "File"
-        },
-        {
-            "trDisplayName": "Project Management",
-            "trShortTitle": "Summary",
-            "typeId": "Summary"
         }
     ],
     "generators" :

src/plugins/projectexplorer/jsonwizard/jsonwizard.cpp

@@ -442,7 +442,7 @@ QString JsonWizard::evaluate(const QVariant &v) const
 void JsonWizard::openFiles(const JsonWizard::GeneratorFiles &files)
 {
     QString errorMessage;
-    bool openedSomething = false;
+    bool openedSomething = stringValue("DoNotOpenFile") == "true";
     for (const JsonWizard::GeneratorFile &f : files) {
         const Core::GeneratedFile &file = f.file;
         if (!QFileInfo::exists(file.path())) {