tweak(Tinebase) change record.copy() implementation

speeds up crewscheduling with large data sets by 20 times

tine20/library/ExtJS/src/data/Record.js

@@ -8,7 +8,7 @@
 const { extend, isPrimitive, isEmpty } = require("Ext/core/core/Ext");
 const Field = require("Ext/data/DataField");
 const MixedCollection = require("Ext/util/MixedCollection");
-const { cloneDeep, forEach } = require('lodash');
+const { get, isFunction, isUndefined, forEach } = require('lodash');
 
 /**
  * @class Record
@@ -413,7 +413,24 @@ Record.id(rec); // automatically generate a unique sequential id
      * @return {Record}
      */
     copy : function(newId) {
-        return  new this.constructor(cloneDeep(this.data), newId || this.id);
+        const data = this.getData();
+        data[this.idProperty] = isUndefined(newId) ? data[this.idProperty] : newId;
+        const copy = Tine.Tinebase.data.Record.setFromJson(data, this.constructor);
+        forEach(this.data, (v, k) => {
+            if (isFunction(get(v, 'copy'))) {
+                this.data[k] = v.copy();
+            }
+        });
+        forEach(this.__metaFields, (m) => {
+            if (this.hasOwnProperty(m)) {
+                copy[m] = this[m];
+            }
+        });
+        copy.modified = [];
+        forEach(this.modified, (v, k) => {
+            copy.modified[k] = isFunction(get(v, 'copy')) ? v.copy() : this.modified[k];
+        });
+        return copy;
     },
 
     /**