Decrease size of table panel when using stem table.

Without this change, the table panel height is always higher than
needed (when using stem table), because the stem table is counted
as one of the items in the components list. It is however shown
separately at the top, which is already accounted for by the
stem table margin.

rabbitinahat/src/main/java/org/ohdsi/rabbitInAHat/MappingPanel.java

@@ -266,10 +266,17 @@ private void setLabeledRectanglesLocation(List<LabeledRectangle> components, int
 	public Dimension getMinimumSize() {
 		Dimension dimension = new Dimension();
 		dimension.width = 2 * (ITEM_WIDTH + MARGIN) + MIN_SPACE_BETWEEN_COLUMNS;
-		int componentsHeight = Math.max(sourceComponents.size(), cdmComponents.size()) * (ITEM_HEIGHT + MARGIN);
+		int maxComponentsSize = Math.max(sourceComponents.size(), cdmComponents.size());
+		int componentsHeight = maxComponentsSize * (ITEM_HEIGHT + MARGIN);
 		dimension.height = Math.min(HEADER_HEIGHT + HEADER_TOP_MARGIN + componentsHeight, maxHeight);
+
 		if (ObjectExchange.etl.hasStemTable()) {
 			dimension.height += STEM_HEIGHT_MARGIN;
+			// For the table mapping panel, deduct the stem table from the items (as it's not shown as a normal item in the list)
+			boolean isTablesPanel = cdmComponents.stream().allMatch(n -> (n.getItem() instanceof Table));
+			if (!cdmComponents.isEmpty() && isTablesPanel) {
+				dimension.height -= (ITEM_HEIGHT + MARGIN);
+			}
 		}
 
 		return dimension;