Merge pull request #122 from mantidproject/bugfix/10888_show_whitespace_state

Works well, the visibility is in sync with the "Window->Show Whitespace" option.

Code/Mantid/MantidPlot/src/MultiTabScriptInterpreter.cpp

@@ -40,7 +40,8 @@
 MultiTabScriptInterpreter::MultiTabScriptInterpreter(ScriptingEnv *env, QWidget *parent)
   : QTabWidget(parent), Scripted(env), m_last_dir(""),
     m_cursor_pos(), m_reportProgress(false), m_recentScriptList(), m_nullScript(new NullScriptFileInterpreter),
-    m_current(m_nullScript), m_globalZoomLevel(0)
+    m_current(m_nullScript), m_globalZoomLevel(0), m_showWhitespace(false),
+    m_replaceTabs(true), m_tabWhitespaceCount(4), m_fontFamily(), m_codeFolding(false)
 {
   connect(this, SIGNAL(currentChanged(int)), this, SLOT(tabSelectionChanged(int)));
 }

Code/Mantid/MantidPlot/src/ScriptingWindow.cpp

@@ -126,7 +126,8 @@ void ScriptingWindow::readSettings()
   m_manager->m_globalZoomLevel = settings.value("ZoomLevel",0).toInt();
   m_toggleFolding->setChecked(settings.value("CodeFolding", false).toBool());
   m_toggleWhitespace->setChecked(settings.value("ShowWhitespace", false).toBool());
-  
+
+  m_manager->m_showWhitespace = m_toggleWhitespace->isChecked();
   m_manager->m_replaceTabs = settings.value("ReplaceTabs", true ).toBool();
   m_manager->m_tabWhitespaceCount = settings.value("TabWhitespaceCount", 4).toInt();
   m_manager->m_fontFamily = settings.value("ScriptFontFamily","").toString();