Ohara: [Manager] Topic selection region problem in Toolbox

[saivirtue]

1. Add a bunch of topics in toolbox (In my case, I've added 22 topics)
2. drag & drop the latest topic in toolbox
   
   
   
   • Expected: should work normally
   
   
   • Actual: could not drag the desire topic
   
   

[saivirtue]

/cc @konekoya

[konekoya]

Thanks for the report. I love real user :)