[Enhancement] Graph List not updated in dropdown Menu after compilation of Create_graph

[Maruf13]

When we want to create a new graph, then should compile below command-

• SELECT * FROM ag_catalog.create_graph('graph_name');
  After successfully comiping, new graph has been created but not shown in dropdown menu. such as-
  

But if we reload age-viewer, then the new graph has shown on that dropdown menu. such as-

So that, this feature should be implemented so that after compiling query, graph should be shown on that menu without refresh or redirect.

[rrrokhtar]

Actually it was the purpose of refresh button to perform that functionality but overall I have created a pull request for that at #132