remove widget in dashboard works only once

[araker]

Issue Summary

When removing multiple widgets in a dashboard, I can only perform the action once. The second time I click on the 'cross' of a widget the 'are you sure' dialog doesn't appear and the widget isn't removed. When I refresh the page, I can remove one widget again.

Steps to Reproduce

1. Create a dashboard
2. add two widgets
3. remove the first widget
4. remove the second widget, this doesn't work

I expect that I can remove multiple widgets, without refreshing the page in between.

Technical details:

• Redash Version: 6.0.0+b8537
• Browser/OS: chromium 66.3359.139 Ubuntu
• How did you install Redash: Ami docker version

[arikfr]

@ranbena no point in addressing this now, but just make sure to address it when working on the React grid.

[kravets-levko]

@arikfr @ranbena This issue is related to gridster library which we use to dashboard layout - sometimes it hooks up a bit more events than needed, and our event handlers stop working. I tried to find a fix for it some time ago, but after migrating to React this problem should just disappear (if React component will not have the same bug 🙂)