refactoring
adding layers page
building
converting tags to layer rule
improving the layers code
loading layers into widget
adding Layer model
using layer position to set priority
using the layer color
improving layers and fixing some bugs
improving map performance
fixing some issues
adding tabs to project edit page
minor fix
removing layers view
getting tags from all objects in layers autocomplete
adding layers to preview map
i18n + minor refactoring
translating some strings
removing "Appearance" tab from new project form