[OE-4180] - Add FieldImages Behaviour
[OE-4180] - fix reference to CFileHelper + add readme file with instructions to add FieldImages
[OE-4180] - changed tests to mock asset manager in  FieldImages, initial version of FieldImages.js with no real functionality yet
[OE-4180] - remove directory separator
[OE-4180] - fix path to dialog opening image
[OE-4180] - change FieldImages to return images lists indexed by field value
[OE-4180] - images displayed in dynamic popup
[OE-4180] - images css float
[OE-4180] - dialog completed + styling
[OE-4180] - changed field images icon and added styling for the dropdowns
Merge branch 'jira/OE-3998' into develop
[OE-3998] - adjusted tests to work with new file path
Merge branch 'jira/OE-3998' into develop