Solving bugs that make scroll bar disappeared after replot TPS

closes #274 (closed)

This MR solving the problem with scroll bar disappeared when click RePlot on main control window and on TPS window as well.

sohstationviewer/view/plotting/time_power_square/time_power_squared_widget.py

@@ -613,6 +613,8 @@ class TimePowerSquaredWidget(plotting_widget.PlottingWidget):
         Reuse tps_data calculated in the first plotting to replot
         with new color range selected.
         """
+        # Not reset the size of main_widget so the size from original plotting
+        # that fit all channels will be maintain.
         self.clear(do_reset_size=False)
         self.start_message_and_reset_processing_states(
             f'RePlotting {self.get_plot_name()} ...')