BHV-10367: AlwaysViewingPanels: Unexpected Path is Created for background source

**Issue**

An extra space was being added after url colons in the style attribute, resulting in wrong paths

**Fix**

modifying a regular expression in Control.normalizeCssStyleString() to not add spaces after colons preceded by http or https

Enyo-DCO-1.1-Signed-off-by: Krishna Rangarajan <krishna.rangarajan@lge.com>