Reset Table::itemHeight on DPI change #62

This commit resets the Table::itemHeight to -1 on DPI change to make
sure that TableItem's height is still managed by the OS as it can be
changed by CDDS_SUBITEMPREPAINT callback and once it is changed to some
value, it will always remain the same and not recalculated by the OS
leading to inconsistent behaviour on different zooms.

contributes to
#62 and
#127

Author: amartya4256

bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/Table.java

@@ -7357,6 +7357,12 @@ private static void handleDPIChange(Widget widget, int newZoom, float scalingFac
 		table.imageList = null;
 	}
 
+	// if the item height was set at least once programmatically with CDDS_SUBITEMPREPAINT,
+	// the item height of the table is not managed by the OS anymore e.g. when the zoom
+	// on the monitor is changed, the height of the item will stay at the fixed size.
+	// Resetting it will re-enable the default behavior again
+	table.setItemHeight(-1);
+
 	for (TableItem item : table.getItems()) {
 		DPIZoomChangeRegistry.applyChange(item, newZoom, scalingFactor);
 	}