fix: plugin set show on dock more times, also need same times call un…

…show

Duplication was kept when saving the configuration, the same plugin was saved multiple times,
but only one was removed when it was removed

log: remove duplication when save dconfig

frame/util/docksettings.cpp

@@ -398,6 +398,7 @@ void DockSettings::setQuickPlugin(QString plugin)
     if (!m_dockSettings)
         return;
     QStringList plugins = m_dockSettings->value(keyQuickPlugins).toStringList();
+    if (plugins.contains(plugin)) return;
     m_dockSettings->setValue(keyQuickPlugins, plugins << plugin);
 }
 
@@ -429,6 +430,7 @@ void DockSettings::setTrayItemOnDock(QString item)
     if (!m_dockSettings)
         return;
     QStringList items = m_dockSettings->value(keyQuickTrayName).toStringList();
+    if (items.contains(item)) return;
     m_dockSettings->setValue(keyQuickTrayName, items << item);
 }