app crash when press cancel while in choose account to Send to Google Drive and Restore from Google Drive

[kr-nahid]

Expected behavior

it shouldn't be crash when user click on cancel button from choose account while in Send to Google Drive and Restore from Google Drive

Actual behavior

when i click on Send to Google Drive and select a collection to send in Google Drive the app crash when i click on cancel button while in choose account . The same situation occurred in Restore from Google Drive

How to reproduce

• download the app
• run it
• then go to settings
• click on Send to Google Drive
• select a collection then press ok
• it must be wants choose account
• then press cancel
• note the bug

Browser/App version: Shelves v3.7.2
Operating system: android 6.0

Recording Of The Bug

https://www.youtube.com/watch?v=3fPrqH-ROYA