No confirmation window of importing data from IE

[luixxiul]

Describe the issue you encountered: The confirmation window of importing data from IE is not displayed.

Expected behavior: It should be displayed.

• Platform (Win7, 8, 10? macOS? Linux distro?): Windows 10
• Brave Version: 0.12.2 RC4
• Steps to reproduce:
  1. Import data from Internet Explorer -> data is imported without the confirmation window
  2. Import data from Edge -> data is imported with the window
• Screenshot if needed:
• Any related issues: add confirmation dialog after successful import of data from other browser #4190 add confirmation dialog after successful import of data from other browser #4188

[bbondy]

/cc @darkdh