- dialog confirm delete item

- fix: context-menu (right click) declared only once and using twice using:
  @click.native="$refs.popover.$refs.popup.show()"

src/components/todos/todo/todo.scss

@@ -59,9 +59,17 @@
   min-height: 10px;
 }
 
+.divtitlecat {
+  margin: 5px;
+  padding: 5px;
+}
+
 .categorytitle{
+  color:blue;
+  background-color: lightblue;
   font-size: 1.25rem;
   font-weight: bold;
+  text-align: center;
 }
 
 .titleSubMenu {