update(nodes): watch nodes width for dimension update

* add force param to setElements, if set we clear the elements arr (default true)
* wait for store watcher until store is ready (i.e. a state has been set)
* move renderer css class to Renderer.vue

Signed-off-by: Braks <78412429+bcakmakoglu@users.noreply.github.com>

src/style.css

@@ -5,6 +5,11 @@
   overflow: hidden;
 }
 
+.vue-flow__zoompane {
+  width: 100%;
+  height: 100%;
+}
+
 .vue-flow__renderer,
 .vue-flow__pane,
 .vue-flow__selectionpane {