Fix deprecation errors for Qt 5.13.

Most are Qt4-isms, except where noted.

* Replaced QFontMetrics::width with QFontMetrics::horizontalAdvance,
  conditionally as the latter wasn't even introduced until Qt 5.11.
* QColor::light and dark instead of QColor::light and dark.
* QString() instead of QString::null.
* std::sort instead of qSort
* QTreeWidgetItem::setSelected instead of QTreeWidget::setItemSelected.
* QFileDialog::setOption(QFileDialog::DontConfirmOverwrite) instead
  of QFileDialog::setConfirmOverwrite(false).
* QDrag::exec instead of QDrag::start.

1 files changed, 1 insertions, 1 deletions

diff --git a/quackleio/dictimplementation.cpp b/quackleio/dictimplementation.cpp
index 2107440..43c1005 100644
--- a/quackleio/dictimplementation.cpp
+++ b/quackleio/dictimplementation.cpp
@@ -77,7 +77,7 @@ Dict::WordList QuackleIO::DictImplementation::query(const QString &query, int fl
 		ret.setSortBy(Dict::WordList::Alphabetical);
 	}
 
-	qSort(ret);
+	std::sort(ret.begin(), ret.end());
 
 	return ret;
 }