No error message and empty logs with broken config

[shalak]

To reproduce on fresh installation:

• provide following configuration:

  {
  "access_token": "your_token",
  "excluded_files": "someFile.sublime-settings"
  }

  Please note that the excluded_files is a string, where it should be []string.

• try to Create & Upload

Expected:

• Valid error is shown, plugin logs contain error message and stacktrace

Actual:

• No error message, no notification - the plugin goes dark. The "Show logs" show empty file.

The Sublime's console show's the culprit:

Traceback (most recent call last):
  File "/Users/username/Library/Application Support/Sublime Text/Installed Packages/Sync Settings.sublime-package/sync_settings/commands/create_and_upload.py", line 26, in on_done
  File "/Users/username/Library/Application Support/Sublime Text/Installed Packages/Sync Settings.sublime-package/sync_settings/sync_manager.py", line 62, in get_files
  File "/Users/username/Library/Application Support/Sublime Text/Installed Packages/Sync Settings.sublime-package/sync_settings/sync_manager.py", line 36, in should_exclude
AttributeError: 'str' object has no attribute 'extend'

I guess we need to check the type before working with the param. Or maybe add schema validation? 🤔