Refs #8349. Don't show all graphs when uncheking "Hide prev. graphs"

As now they all share the same place, when all shown they are hidden behind
a single graph.

That's a simple solution, need to discuss whether scientists want something
different to happen.

Code/Mantid/MantidQt/CustomInterfaces/inc/MantidQtCustomInterfaces/MuonAnalysisOptionTab.h

@@ -102,10 +102,6 @@ public slots:
   /// Emitted when plot style parameters has changed.
   void plotStyleChanged();
 
-  /// Tell Muon interface to show the muon graphs
-  void notHidingGraphs();
-
-
 private:
   /// The Muon Analysis UI file.
   Ui::MuonAnalysis& m_uiForm;

Code/Mantid/MantidQt/CustomInterfaces/src/MuonAnalysis.cpp

@@ -129,8 +129,6 @@ void MuonAnalysis::initLayout()
 
   m_optionTab = new MuonAnalysisOptionTab(m_uiForm, m_settingsGroup);
   m_optionTab->initLayout();
-  // Add the graphs back to mantid if the user selects not to hide graphs on settings tab.
-  connect(m_optionTab, SIGNAL(notHidingGraphs()), this, SLOT(showAllPlotWindows()));
 
   m_fitDataTab = new MuonAnalysisFitDataTab(m_uiForm);
   m_fitDataTab->init();

Code/Mantid/MantidQt/CustomInterfaces/src/MuonAnalysisOptionTab.cpp

@@ -395,10 +395,6 @@ void MuonAnalysisOptionTab::hideGraphsChanged(bool state)
   QSettings group;
   group.beginGroup(m_settingsGroup + "SettingOptions");
   group.setValue("hiddenGraphs", state);
-  if (state)
-    emit settingsTabUpdatePlot();
-  else
-    emit notHidingGraphs();
 }