Try to fix ghost icons on Windows.

Related to #1295

src/bin/bin.cpp

@@ -992,7 +992,6 @@ Bin::Bin(std::shared_ptr<ProjectItemModel> model, QWidget *parent, bool isMainBi
     // Init icons
     m_audioIcon = QImage(iconSize, iconSize, QImage::Format_ARGB32_Premultiplied);
     m_videoIcon = QImage(iconSize, iconSize, QImage::Format_ARGB32_Premultiplied);
-    slotUpdatePalette();
 
     // Tags panel
     m_tagsWidget = new TagWidget(this);

src/bin/bin.h

@@ -398,7 +398,6 @@ private slots:
     /** @brief Switch a tag on  a clip list
      */
     void editTags(QList <QString> allClips, const QString &tag, bool add);
-    void slotUpdatePalette();
 
 public slots:
     void slotRemoveInvalidClip(const QString &id, bool replace, const QString &errorMessage);
@@ -453,6 +452,7 @@ public slots:
     void showTitleWidget(const std::shared_ptr<ProjectClip> &clip);
     /** @brief Add a clip in a specially named folder */
     bool addProjectClipInFolder(const QString &path, const QString &parentFolder, const QString &folderName);
+    void slotUpdatePalette();
 
 protected:
     /* This function is called whenever an item is selected to propagate signals

src/core.cpp

@@ -233,6 +233,8 @@ void Core::initGUI(bool isAppImage, const QString &MltPath, const QUrl &Url, con
     }
     QMetaObject::invokeMethod(pCore->projectManager(), "slotLoadOnOpen", Qt::QueuedConnection);
     m_mainWindow->show();
+    bin->slotUpdatePalette();
+    emit m_mainWindow->GUISetupDone();
 }
 
 void Core::buildLumaThumbs(const QStringList &values)