BaseTextEditor: adding translatedLineRegion()

this function returns the bound region for the text in
lineStart to lineEnd

We use this to position the context pane

src/plugins/texteditor/basetexteditor.h

@@ -216,6 +216,8 @@ public:
 
     int verticalBlockSelection() const;
 
+    QRegion translatedLineRegion(int lineStart, int lineEnd) const;
+
 public slots:
     void setDisplayName(const QString &title);