CMS-3843 When 'Input Type Image' edited , new image not showed and spinner does not disappear. 

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