Description of problem: No progress is displayed for Administration->Agent plugins->Scan for Updates operation. Operation can run for long time and user is not notified that operation is actually running. Version-Release number of selected component (if applicable): Version: 3.1.0.CR1 Build Number: 4bc4270:1b85993 How reproducible: Always Steps to Reproduce: 1.copy a new version of some agent plugin to $JON_SERVER_HOME/plugins 2.click on Administration->Agent plugins->Scan for Updates Actual results: Operation is launched on the background but no visible notification is displayed. User can click on Scan for Updates button several times but nothing happens visually. Expected results: Scanning in progress message, progress bar, disable Scan for Updates button or anything to let user know that operation was launched.