Fix BaseTextmark lineNumber tracking

The following sequence would add the BaseTextmark to the wrong line:
1) Add a mark on line x
2) Move line x down by addign newlines above
3) Close and reopen the file
=> Mark would be readded to line x

Change-Id: Ia5d580b5893331974fb908e367b74df69fbb6572
Reviewed-by: Eike Ziller <eike.ziller@nokia.com>

src/plugins/debugger/breakpointmarker.cpp

@@ -68,6 +68,7 @@ void BreakpointMarker::removedFromEditor()
 void BreakpointMarker::updateLineNumber(int lineNumber)
 {
     breakHandler()->updateLineNumberFromMarker(m_id, lineNumber);
+    BaseTextMark::updateLineNumber(lineNumber);
 }
 
 } // namespace Internal