Grid vertical scrolling

plugins/org.jkiss.dbeaver.ui.editors.data/src/org/jkiss/dbeaver/ui/controls/lightgrid/LightGrid.java

@@ -1786,8 +1786,11 @@ public abstract class LightGrid extends Canvas {
      *
      * @param item the item to be shown
      */
-    public void showItem(int item)
-    {
+    public void showItem(int item) {
+        showItem(item, -1);
+    }
+
+    public void showItem(int item, int topOffset) {
         checkWidget();
 
         updateScrollbars();
@@ -1797,6 +1800,11 @@ public abstract class LightGrid extends Canvas {
             return;
         }
 
+        if (topOffset >= 0) {
+            setTopIndex(Math.max(0, item - topOffset));
+            return;
+        }
+
         // if its visible just return
         if (isShown(item)) {
             return;
@@ -2403,7 +2411,7 @@ public abstract class LightGrid extends Canvas {
 
         // if the scrollbar is visible set its values
         if (vScroll.getVisible()) {
-            int max = getItemCount();
+            int max = getItemCount() + 1;
             int thumb = (getVisibleGridHeight() + 1) / (getItemHeight() + 1);
 
             // if possible, remember selection, if selection is too large, just