Feature/custom locations (#74)

* New feature: custom locations

* Custom locations: exteding config generator

* Custom locations: refactoring

* Fixing proxy_host table on small screens

* Custom locations: translations

* Custom locations bugfix

* Custom locations bugfix

* PR #74 fixes

src/frontend/js/models/proxy-host-location.js

@@ -0,0 +1,37 @@
+'use strict';
+
+const Backbone = require('backbone');
+
+const model = Backbone.Model.extend({
+    idAttribute: 'id',
+
+    defaults: function() {
+        return {
+            opened:             false,
+            path:               '',
+            advanced_config:    '',
+            forward_scheme:     'http',
+            forward_host:       '',
+            forward_port:       '80'
+        }
+    },
+
+    toJSON() {
+        const r = Object.assign({}, this.attributes);
+        delete r.opened;
+        return r;
+    },
+
+    toggleVisibility: function () {
+        this.save({
+            opened: !this.get('opened')
+        });
+    }
+})
+
+module.exports = {
+    Model: model,
+    Collection: Backbone.Collection.extend({
+        model
+    })
+}