Old Browsers and Drag'n'Drop

Webix JS
#1

Hi!
In the code you use Proxy, this causes problems in older browsers.
webix UI v.6.1.4 (GPL) Line 4531
evobj = new Proxy

#2

Up.

#3

Up.

#4

Up.
Not work with Android 4.3/5.0/6.0

#5

Left API lvl 21 (Android 5.0)
Right API lvl 23 (Android 6.0)