Fixed route names parsing according to new names in API routes
Started implementing nodes_picker_footer widget;
Fixed entities_list to wake only after API routes are set
Fixed and refactored legend item craetion/selection/deletion flow
Implementing new design
Fixing some colors;
Fixed + sign on add_legend
Removed filters.css
Changing nodes_picker header to a single container layout
Changing layout and behavior of legend_item_buttons
Implementing layout and design of nodes_list