Fix i18n issues

Fix some missing Tr::, and some namespace usages that confused lupdate.

Change-Id: Ib5a411fc53a28a6b807600db50aacc68955ca5dc
Reviewed-by: hjk <hjk@qt.io>
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@qt.io>

src/plugins/effectcomposer/effectcomposerview.h

@@ -24,6 +24,7 @@ public:
 
 class EffectComposerView : public QmlDesigner::AbstractView
 {
+    Q_DECLARE_TR_FUNCTIONS(EffectComposer::EffectComposerView)
 public:
     EffectComposerView(QmlDesigner::ExternalDependenciesInterface &externalDependencies);
     ~EffectComposerView() override;