Description of problem:

When uploading an image for a custom migration target, the image should be up to 1Mb of size.
In the case of a bigger image, there is an error that is not informative enough: "imageID must be defined". After few seconds the note under the image name is restarted to: "Upload a png or jpeg file".

Version-Release number of selected component (if applicable):

MTA 6.1.0-3

How reproducible:

100%

Steps to Reproduce:

1. Create/Edit a custom migration target
2. Upload an image with a size greater than 1Mb as the custom target icon

Actual results:

An error message is displayed: "imageID must be defined" under the image name.
After few seconds the note is restarted to: "Upload a png or jpeg file".

Expected results:

• The error message should be more informative regarding the image size is not compatible.
• The error message does not disappear until uploading another image (a good one) OR pressing the Clear button to restart the image upload process