Insert hook_social_networks for programmatically expanding the list of networks + removed Orkut from default list

Issue #2715939 by atiba: How do I remove the   suffix? (implementation theme_preprocess_HOOK for easier theme-hooking)

Issue #2450487 by OnkelTem: Fixed undefined index in social_share_update_network_order() + removed machine name for editing networks

Add logic to reorder enabled networks for block and all node types when networks are added/removed or reordered on the tabledrag form.

Add destination query parameter to node type edit links on social share system-wide settings form to redirect back to settings form on save of node type edit form.