Fix that Graphryder Dashboard obtains all data twice from Graphryder API

[tanius]

Just made a funny observation in the "Network" tab of Chrome's web developer tools: when reloading the Graphryder Dashboard frontpage, there are two identical sets of requests to the API. Means, the JSON data (usually the biggest chunk of data to be loaded at startup) is loaded twice, obviously making the startup slower that it has to be. Here are the requests that I see when reloading https://graphryder1.edgeryders.eu/#!/dashboard/globalView:

https://graphryder1.edgeryders.eu/api/users
https://graphryder1.edgeryders.eu/api/posts
https://graphryder1.edgeryders.eu/api/comments
https://graphryder1.edgeryders.eu/api/tags
…
https://graphryder1.edgeryders.eu/api/users
https://graphryder1.edgeryders.eu/api/posts
https://graphryder1.edgeryders.eu/api/comments
https://graphryder1.edgeryders.eu/api/tags