Describe the bug
A bookmark with an invalid directory can be created.

To Reproduce
Steps to reproduce the behavior:

1. Click on 'Hamburger' menu
2. Go to 'Settings'
3. Click on 'Interface'
4. Under 'Sidebar', go to 'Bookmarks'
5. Click on 'Add Item'
6. Enter an invalid directory
7. Enter the bookmark name
8. Click on 'CREATE'

Expected behavior
The app should prevent creating a bookmark with an invalid directory.

Screen Recording

Smartphone (please complete the following information):

• Device: [Google Pixel 5]
• OS: [Android 14]
• Rooted: [No]
• Version: [3.10]

Additional context
If the name is entered first and an invalid directory is provided, the 'CREATE' button is disabled, preventing the creation of a bookmark with an invalid directory.