Change scattering openinng panel from CSca to mus

Author: janakarana

src/app/dialog/mainwindow.ui

@@ -2402,7 +2402,7 @@
        <enum>Qt::LeftToRight</enum>
       </property>
       <property name="currentIndex">
-       <number>1</number>
+       <number>0</number>
       </property>
       <property name="movable">
        <bool>true</bool>
@@ -2464,7 +2464,7 @@
        <enum>QTabWidget::Rounded</enum>
       </property>
       <property name="currentIndex">
-       <number>1</number>
+       <number>0</number>
       </property>
       <property name="usesScrollButtons">
        <bool>true</bool>