Revert "Updated regex for ID" file input widget problem

[simplyr]

The latest commit 75c4271 not working with widget-fileinput by kartik. You can see that in your example here dynamicform-demo2

When you pick an image and then try to duplicate you get this error:
yii2-dynamic-form.min.js:8 Uncaught TypeError: Cannot read property 'widgetItem' of undefined
at _updateAttrID (yii2-dynamic-form.min.js:8)
at HTMLDivElement. (yii2-dynamic-form.min.js:8)
at Function.each (jquery.js:374)
at jQuery.fn.init.each (jquery.js:139)
at HTMLTableRowElement. (yii2-dynamic-form.min.js:8)
at Function.each (jquery.js:374)
at jQuery.fn.init.each (jquery.js:139)
at _updateAttributes (yii2-dynamic-form.min.js:8)
at _addItem (yii2-dynamic-form.min.js:8)
at jQuery.fn.init.addItem (yii2-dynamic-form.min.js:8)

When I replace:
var regexID = /^(.+?)([-\d-]{1,})(.+)$/i;
with the old one
var regexID = /^(.+?)(-\d{1,}-)(.+)$/i;
everything works just fine.