Splunk dashboard is using js from 
/en-US/static/@271043.15:1438207159/app/my-app-name/table_icons_inline_modified.js 
but I wanted to use 
/en-US/static/app/my-app-name/table_icons_inline_modified.js
since the former one seems to be an old copy of the file which is cached somewhere. I tried to clear browser cache and restarted Splunk, but no joy. Can someone help please?
There is a little known url that can help you break the cache.
https://<yoursplunk>/en-US/_bump
Navigate here, and click the button. This will update the url to be:
/en-US/static/@271043.16/app/my-app-name/table_icons_inline_modified.js 
If the js doesn't change, then it is not changed in the filesystem.  the @271043.16 refers to the Splunk Build, and then the bump number after that. 
There is a little known url that can help you break the cache.
https://<yoursplunk>/en-US/_bump
Navigate here, and click the button. This will update the url to be:
/en-US/static/@271043.16/app/my-app-name/table_icons_inline_modified.js 
If the js doesn't change, then it is not changed in the filesystem.  the @271043.16 refers to the Splunk Build, and then the bump number after that.