Fix bugs of uploading csv after used google sheets
Fix bugs of uploading csv after used google sheets

user can upload csv file after used google sheet without reload the
page.

tt-acm/DesignExplorer,tt-acm/DesignExplorer,MingboPeng/DesignExplorer,serenayl/DesignExplorer,serenayl/DesignExplorer,MingboPeng/DesignExplorer