core/ui: use 'mid' instead if 'midRef'

Required for Qt 6, where 'midRef' has been removed from QString, and
'mid' can already be used with Qt 5.

Picked from: #1770

Author: Chiitoo

src/core/BookmarksManager.cpp

@@ -158,12 +158,12 @@ BookmarksModel::Bookmark* BookmarksManager::getBookmark(const QString &text)
 
 	if (text.startsWith(QLatin1Char('#')))
 	{
-		return m_model->getBookmark(text.midRef(1).toULongLong());
+		return m_model->getBookmark(text.mid(1).toULongLong());
 	}
 
 	if (text.startsWith(QLatin1String("bookmarks:")))
 	{
-		return (text.startsWith(QLatin1String("bookmarks:/")) ? m_model->getBookmarkByPath(text.mid(11)) : getBookmark(text.midRef(10).toULongLong()));
+		return (text.startsWith(QLatin1String("bookmarks:/")) ? m_model->getBookmarkByPath(text.mid(11)) : getBookmark(text.mid(10).toULongLong()));
 	}
 
 	return m_model->getBookmarkByKeyword(text);

src/core/BookmarksModel.cpp

@@ -1169,7 +1169,7 @@ BookmarksModel::Bookmark* BookmarksModel::getBookmarkByPath(const QString &path,
 
 	if (path.startsWith(QLatin1Char('#')))
 	{
-		return getBookmark(path.midRef(1).toULongLong());
+		return getBookmark(path.mid(1).toULongLong());
 	}
 
 	Bookmark *bookmark(m_rootItem);

src/core/InputInterpreter.cpp

@@ -71,7 +71,7 @@ InputInterpreter::InterpreterResult InputInterpreter::interpret(const QString &t
 
 	if (text.startsWith(QLatin1String("bookmarks:")))
 	{
-		BookmarksModel::Bookmark *bookmark(text.startsWith(QLatin1String("bookmarks:/")) ? BookmarksManager::getModel()->getBookmarkByPath(text.mid(11)) : BookmarksManager::getBookmark(text.midRef(10).toULongLong()));
+		BookmarksModel::Bookmark *bookmark(text.startsWith(QLatin1String("bookmarks:/")) ? BookmarksManager::getModel()->getBookmarkByPath(text.mid(11)) : BookmarksManager::getBookmark(text.mid(10).toULongLong()));
 
 		if (bookmark)
 		{

src/core/NetworkAutomaticProxy.cpp

@@ -78,7 +78,7 @@ int PacUtils::dnsDomainLevels(const QString &host) const
 {
 	if (host.startsWith(QLatin1String("www."), Qt::CaseInsensitive))
 	{
-		return host.midRef(4).count(QLatin1Char('.'));
+		return host.mid(4).count(QLatin1Char('.'));
 	}
 
 	return host.count(QLatin1Char('.'));

src/ui/ToolBarDialog.cpp

@@ -445,7 +445,7 @@ void ToolBarDialog::editEntry()
 		}
 		else if (identifier.startsWith(QLatin1String("bookmarks:")))
 		{
-			const BookmarksModel::Bookmark *bookmark(identifier.startsWith(QLatin1String("bookmarks:/")) ? BookmarksManager::getModel()->getBookmarkByPath(identifier.mid(11)) : BookmarksManager::getBookmark(identifier.midRef(10).toULongLong()));
+			const BookmarksModel::Bookmark *bookmark(identifier.startsWith(QLatin1String("bookmarks:/")) ? BookmarksManager::getModel()->getBookmarkByPath(identifier.mid(11)) : BookmarksManager::getBookmark(identifier.mid(10).toULongLong()));
 
 			if (bookmark)
 			{
@@ -791,7 +791,7 @@ QMap<int, QVariant> ToolBarDialog::createEntryData(const QString &identifier, co
 	}
 	else if (identifier.startsWith(QLatin1String("bookmarks:")))
 	{
-		const BookmarksModel::Bookmark *bookmark(identifier.startsWith(QLatin1String("bookmarks:/")) ? BookmarksManager::getModel()->getBookmarkByPath(identifier.mid(11)) : BookmarksManager::getBookmark(identifier.midRef(10).toULongLong()));
+		const BookmarksModel::Bookmark *bookmark(identifier.startsWith(QLatin1String("bookmarks:/")) ? BookmarksManager::getModel()->getBookmarkByPath(identifier.mid(11)) : BookmarksManager::getBookmark(identifier.mid(10).toULongLong()));
 
 		if (bookmark)
 		{

src/ui/WidgetFactory.cpp

@@ -164,7 +164,7 @@ QWidget* createToolBarItem(const ToolBarsManager::ToolBarDefinition::Entry &defi
 
 	if (definition.action.startsWith(QLatin1String("bookmarks:")))
 	{
-		BookmarksModel::Bookmark *bookmark(definition.action.startsWith(QLatin1String("bookmarks:/")) ? BookmarksManager::getModel()->getBookmarkByPath(definition.action.mid(11)) : BookmarksManager::getBookmark(definition.action.midRef(10).toULongLong()));
+		BookmarksModel::Bookmark *bookmark(definition.action.startsWith(QLatin1String("bookmarks:/")) ? BookmarksManager::getModel()->getBookmarkByPath(definition.action.mid(11)) : BookmarksManager::getBookmark(definition.action.mid(10).toULongLong()));
 
 		if (bookmark)
 		{