Refs #17753 Add new icon for tool

MantidQt/MantidWidgets/src/InstrumentView/InstrumentWidgetPickTab.cpp

@@ -240,7 +240,7 @@ InstrumentWidgetPickTab::InstrumentWidgetPickTab(InstrumentWidget *instrWidget)
   m_peakCompare = new QPushButton();
   m_peakCompare->setCheckable(true);
   m_peakCompare->setAutoExclusive(true);
-  m_peakCompare->setIcon(QIcon(":/PickTools/selection-peaks.png"));
+  m_peakCompare->setIcon(QIcon(":/PickTools/selection-peak-compare.png"));
   m_peakCompare->setToolTip("Compare single crystal peak(s)");
 
   QGridLayout *toolBox = new QGridLayout();

images/MantidWidgets.qrc

@@ -13,6 +13,7 @@
         <file>selection-box-ring.png</file>
         <file>selection-circle-ring.png</file>
         <file>brush.png</file>
+        <file>selection-peak-compare.png</file>
     </qresource>
     <qresource prefix="/MaskTools">
         <file>selection-circle.png</file>