Closes #168: Tests for Check if content are lazyloaded while scrolling seems always failing for the templates lazyload_css_background_images, ll_bg_css_single_colon and ll_bg_css_double_colon

Closes #168: Tests for Check if content are lazyloaded while scrolling seems always failing for the templates lazyload_css_background_images, ll_bg_css_single_colon and ll_bg_css_double_colon #85