Backport CMS7-7039: Regression: Unable to close image picker dialog when uploading fails (Flash off)

pre-requisite - Disable flash

1. Login to CMS
2. Navigate to documents, images and upload a huge file >10M
3. CMS will throw an error message that the file is too large to upload
4. Click on the cancel button to close the image picker dialog

Expected - User should be able to close the image picker by clicking the cancel button
Actual - Unable to close the image picker with cancel button, use the "X" mark to close the dialog