old_contents: /**
   * Storage (save data to localStorage)
   */
  
  var config = {};
  
  var storage = {
    set : function (key, value, stringify) {
      var isChanged = config.hasOwnProperty(key) && (config[key] !== value);
  
      if(isChanged) {
        config[key] = value;
  
        value = stringify ? JSON.stringify(value) : value;
        localStorage.setItem(key, value);
      }
    },
  
    get : function (key, type) {
      var value;
  
      if(!config.hasOwnProperty(key)) {
        value = localStorage.getItem(key);
        switch(type) {
          case 'boolean':
            value = value === 'true' ? true : false;
            break;
          case 'object':
            value = JSON.parse(val);
            break;
        }
  
        config[key] = value;
      }
  
      return config[key];
    },
  
    setFile : function (file) {
      if(!file || !file.path) return;
      config.file = file.path;
    },
  
    getFile : function () {
      return config.file;
    },
  
    rmFile : function () {
      config.file = null;
    },
  
    formConfig : function () {
      return extend(config, { filter : '1' });
    }
  };
  
  module.exports = storage;
  
  /**
   * Simple extend function for key-value pairs
   */
  function extend(a, b) {
    var obj = {};
  
    Object.getOwnPropertyNames(a).forEach(function (prop) {
      obj[prop] = a[prop];
    });
  
    Object.getOwnPropertyNames(b).forEach(function (prop) {
      obj[prop] = b[prop];
    });
  
    return obj;
  }
  
new_contents: /**
   * Storage (save data to localStorage)
   */
  
  var config = {};
  
  var storage = {
    set : function (key, value, stringify) {
      var isChanged = config.hasOwnProperty(key) && (config[key] !== value);
  
      if(isChanged) {
        config[key] = value;
  
        value = stringify ? JSON.stringify(value) : value;
        localStorage.setItem(key, value);
      }
    },
  
    get : function (key, type) {
      var value;
  
      if(!config.hasOwnProperty(key)) {
        value = localStorage.getItem(key);
        switch(type) {
          case 'boolean':
            value = value === 'true' ? true : false;
            break;
          case 'object':
            value = JSON.parse(val);
            break;
        }
  
        config[key] = value;
      }
  
      return config[key];
    },
  
    setFile : function (file) {
      if(!file || !file.path) return;
      config.file = file.path;
    },
  
    getFile : function () {
      return config.file;
    },
  
    rmFile : function () {
      config.file = null;
    },
  
    formConfig : function () {
      return extend(config, {});
    }
  };
  
  module.exports = storage;
  
  /**
   * Simple extend function for key-value pairs
   */
  function extend(a, b) {
    var obj = {};
  
    Object.getOwnPropertyNames(a).forEach(function (prop) {
      obj[prop] = a[prop];
    });
  
    Object.getOwnPropertyNames(b).forEach(function (prop) {
      obj[prop] = b[prop];
    });
  
    return obj;
  }
  
subject: Remove predefined filter value