Save As/file selection dialog appears twice when offline

[gulkily]

Test plan

#11906 (comment)

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Did you search for similar issues before submitting this one?
Yes

Describe the issue you encountered:
When offline, using the Save As command results in the file selection dialog appearing twice

Expected behavior:
Dialog should only appear once

• Platform (Win7, 8, 10? macOS? Linux distro?): macOS
• Brave Version: 0.12.0
• Steps to reproduce:
  1. Load a page
  2. Disconnect from network
  3. File | Save As
  4. Choose a file name and press Save

Expected: Page saved, no further activity

Actual: Page is not saved (#3783) and the Save As/file-selection dialog appears again

• Screenshot if needed:
• Any related issues:

[charbelrami]

Reproduced on Win 10 64-bit.

'Save As' opens the folder where the latest download was saved, e.g. Desktop.
If you press Save, it closes that folder and opens the 'Downloads' folder.

[bsclifton]

Moving to 0.22.x; we're going to have 0.21.x-C65 only contain the Chromium upgrade 😄 👍

[kjozwiak]

Verified that the above issue has been fixed on macOS 10.13.3 x64 using the following build:

• 0.22.6 e6ff4ea
• libchromiumcontent: 65.0.3325.162
• muon: 5.1.0

Also went through the case mentioned in #3784 (comment)

Verified on Ubuntu 10.10 x64

• 0.22.7 8bb7e77
• libchromiumcontent: 65.0.3325.181
• muon: 5.1.1