Performance is bad

[jgero]

The page takes very long to load, especially the first page. This is probably because a ton of JS is loaded with ngrx, angular and material.... Some improvements need to be made for that.

• [x] update angular version (may have better tree-shaking), related to #299
• [x] update firebase sdk (definitely has better tree-shaking), related to #299
• [ ] decreasing the size of the first loaded module even more, may be related to #164 , maybe even remove ngrx if that lib is too big

Regarding the bundle size have a look at this article, it has some nice tips for analyzing and decreasing the size of the first module.

[jgero]

Also the development is sometimes very slow because of the amount of packages the app uses. Maybe remove all the testing dependencies, because they are not used anyways and don't have to be downloaded every time.

[jgero]

After updating the packages and analyzing the bundles it turns out that the angular rutime and firebase kit are the main culprits of the huge bundle size. This basically means there is no easy way of making the bundle smaller. Maybe just update the packages as the first step, because this itself reduces the size, and work on a bigger rework with maybe another framework.