Make table big enough to fit all columns

This commit adds a minor layout improvement to remove hard-coded column widths and instead set a minimum width on the table which should be enough to fit the new ProcessingInstructions column

Re #22039

qt/scientific_interfaces/ISISReflectometry/QtReflSettingsView.cpp

@@ -66,8 +66,6 @@ void QtReflSettingsView::initOptionsTable() {
 
   // Set angle and scale columns to a small width so everything fits
   table->resizeColumnsToContents();
-  table->setColumnWidth(0, 40);
-  table->setColumnWidth(5, 40);
 
   auto header = table->horizontalHeader();
   int totalRowHeight = 0;

qt/scientific_interfaces/ISISReflectometry/ReflSettingsWidget.ui

@@ -263,6 +263,18 @@
         </item>
         <item row="3" column="1" rowspan="3" colspan="3">
          <widget class="QTableWidget" name="optionsTable">
+          <property name="sizePolicy">
+           <sizepolicy hsizetype="MinimumExpanding" vsizetype="Expanding">
+            <horstretch>0</horstretch>
+            <verstretch>0</verstretch>
+           </sizepolicy>
+          </property>
+          <property name="minimumSize">
+           <size>
+            <width>600</width>
+            <height>0</height>
+           </size>
+          </property>
           <property name="toolTip">
            <string>Specify options based on the run angle. Leave the angle empty to specify defaults for all runs.</string>
           </property>