feat: make dialog resizable by default

Close #24

Author: paodb

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

@@ -115,6 +115,7 @@ private void initWindow() {
     }
     setWidth("800px");
     setCloseOnEsc(true);
+    setResizable(true);
     add(createMainLayout());
   }