Fix gaps in settings

[tamarinvs19]

Description

Removed unnecessary space after code generation language in Java specific settings.

How to test

Manual tests

1. Install UnitTestBot in IntelliJ IDEA
2. Open UnitTestBot settings
3. Open subpage with Java Specific Settings
4. Expected:
   • Place 1: without big empty space after codegen language)
   • Place 2 and 3: these spaces are separating mocking block

Self-check list

Check off the item if the statement is true. Hint: [x] is a marked item.

Please do not delete the list or its items.

• [x] I've set the proper labels for my PR (at least, for category and component).
• [x] PR title and description are clear and intelligible.
• [x] I've added enough comments to my code, particularly in hard-to-understand areas.
• [ ] The functionality I've repaired, changed or added is covered with automated tests.
• [x] Manual tests have been provided optionally.
• [ ] The documentation for the functionality I've been working on is up-to-date.