Plugin API DirectoryPath display error with space

[JackGruber]

When a path with space is selected with the SettingItemSubType.DirectoryPath the path is displayed truncated after the space.

Environment

Joplin 2.9.1 (dev, win32)

Client ID: a1021b9020f14fc8bb841cd357208e9d
Sync Version: 3
Profile Version: 41
Keychain Supported: Yes

Revision: c3179a3

Steps to reproduce

1. Select a path with the file selector (for example used in Simple Backup) which contains a space. For example c:\temp\test backup
2. The Path is truncated after the space to c:\temp\test

Describe what you expected to happen

The whole path should be displayed