Adds option to make editor not scroll on debugging

Added an option to change the behavior of the debuggercore so that
the current editor isn't always centered on the current line, to stop
unnecessary jumping of the code.

Change-Id: I9406df518bb1b977e39a0265ee7fd6fae2069ed9
Reviewed-by: hjk <hjk121@nokiamail.com>

src/plugins/debugger/debuggerengine.cpp

@@ -540,7 +540,9 @@ void DebuggerEngine::gotoLocation(const Location &loc)
     IEditor *editor = EditorManager::openEditor(file, Id(),
                                                 EditorManager::IgnoreNavigationHistory, &newEditor);
     QTC_ASSERT(editor, return); // Unreadable file?
-    editor->gotoLine(line, 0);
+
+    editor->gotoLine(line, 0, !debuggerCore()->boolSetting(StationaryEditorWhileStepping));
+
     if (newEditor)
         editor->document()->setProperty(Constants::OPENED_BY_DEBUGGER, true);