fix: make ErrorWindow draggable

Author: javier-godoy

src/main/java/com/flowingcode/vaadin/addons/errorwindow/ErrorWindow.java

@@ -119,6 +119,7 @@ private void initWindow() {
     setWidth("800px");
     setCloseOnEsc(true);
     setResizable(true);
+    setDraggable(true);
     getElement().getThemeList().add("error-window");
     add(createMainLayout());
   }
@@ -175,6 +176,9 @@ private Button createDetailsButtonLayout() {
               } else {
                 event.getSource().setIcon(VaadinIcon.PLUS.create());
               }
+              event.getSource().getElement()
+                  .executeJs(
+                      "var overlay = this.closest('vaadin-dialog-overlay'); if (overlay) overlay.$.overlay.style.height=''");
             });
     errorDetailsButton.setIcon(VaadinIcon.PLUS.create());
     return errorDetailsButton;