Minor updates and fixes in front form rendering.
Fix getResourceFilePath for Project themes.
On cart normalize, store visual visualId and visualSrc in lines' options if a productId is set.
If Rbs/Commerce/Cart/visualFormat is set in the configuration, with an array containing 'width' and 'heigth' values, a visualThumbnailSrc value is added.
Minor cleanup and fixes.
Merge pull request #951 from intportg/dev

Visuals in cart + misc fixes and cleanup