CMS-3816 Input Type Image - Not possible to click "edit" on image when i...

1. changed ImgEl.ts: added new property boolean 'loaded'. When image was changed in the SelectedOptionView(clicked 'edit' button and upload new image), so image will be refreshed.

2. when the image is edited, the new parameter 'time=...' will be added in the URL(img src)
  so, for this for this purpose 2 new methods added in the UriHelper.ts
3. the same with editing of icon in all wizards: parameter 'time'  will be added when image was edited