slow loading GetFeatureInfo images need the resizer to wait a little
Removed unused function.
Moved and renamed the image resizing function.

It's now also parameterised in case we want to use it for a different set of images.
Cleanup and refactor.
Resize after delay.
Merge pull request #1165 from aodn/imageSizer_after_load

Image sizer after load 
fixes #1148