Add button to create multi-community from listing page

[Nutomic]

Besides the existing create button on the homepage, there should also be a create button directly on the multi-community listing page. Same goes for a create community button on the community list page.

[dessalines]

Good idea. I removed these from the navbar because they were cluttering it up, but it'd definitely be a good idea to add them to those dedicated /communities pages also.